Re: ANN: new open-source window manager for OS X
On Apr 17, 2013, at 11:44 AM, Steven Degutis wrote: > Called Windows.app. ... I think someone may have used the name "Windows" already... Charles ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Modeling a Linux USB Serial Driver with IOKit
Ahoy,
I've been working hard on a basic implementation of a userspace driver for the
WCH341. Would you mind offering some advice for where I may have gone astray?
I've got the device/interface endpoints setup correctly. That is, _usbDevice
and _usbInterface have been initialized properly. I can't configure the device
to get write/read to work. My application is very simple, send one "W\n" and
receive a basic string response from the serial device (9600 baud).
I'm modeling this after
http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/drivers/usb/serial/ch341.c
Here is my home grown way to set control.
-(void)sendControlRequest:(int)requestValue
inDirection:(int)direction
withValue:(int)bufferValue
atIndex:(int)index
bufferSize:(int)size
{
NSLog(@"-START");
IOReturnkr;
int writeBuffer[size];
writeBuffer[0] = bufferValue; // Status Request
USBDeviceAddress deviceAddress;
IOUSBDevRequest request;
kr = (*_usbDevice)->GetDeviceAddress(_usbDevice, &deviceAddress);
request.bmRequestType = USBmakebmRequestType(direction, kUSBVendor,
kUSBDevice);
request.bRequest = requestValue;
request.wValue = deviceAddress;
request.wIndex = index;
request.wLength = size;
request.pData = &writeBuffer;
kr = (*_usbDevice)->DeviceRequest(_usbDevice, &request);
if (kr == kIOReturnSuccess)
{
NSLog(@"Success - Bytes are %x and %x", writeBuffer[0], writeBuffer[1]);
}else if ( kr == kIOReturnOverrun)
{
NSLog(@"Device request failed: overrun");
}else
{
NSLog(@"WriteToDevice reset returned err 0x%x\n", kr);
}
NSLog(@"-END");
}
… Then later, I set up the register/values from
http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/drivers/usb/serial/ch341.c…
// ch341_control_in(dev, 0x5f, 0, 0, buffer, size);
[self sendControlRequest:0x5f inDirection:kUSBIn withValue:0 atIndex:0
bufferSize:2];
// ch341_control_out(dev, 0xa1, 0, 0);
[self sendControlRequest:0xa1 inDirection:kUSBOut withValue:0 atIndex:0
bufferSize:2];
// ch341_control_out(dev, 0x9a, 0x1312, a);
[self sendControlRequest:0x9a
inDirection:kUSBOut
withValue:0x1312
atIndex:[self calculateBaudrate]
bufferSize:2];
// ch341_control_in(dev, 0x95, 0x2518, 0, buffer, size);
[self sendControlRequest:0x5f inDirection:kUSBIn withValue:0 atIndex:0
bufferSize:2];
//ch341_control_out(dev, 0x9a, 0x2518, 0x0050);
[self sendControlRequest:0x9a inDirection:kUSBOut withValue:0x2518
atIndex:0x0050 bufferSize:2];
// STATUS - EXPECT 0xff 0xee
[self sendControlRequest:0x95 inDirection:kUSBIn withValue:0x0706 atIndex:0
bufferSize:2];
//ch341_control_out(dev, 0xa1, 0x501f, 0xd90a);
[self sendControlRequest:0xa1 inDirection:kUSBOut withValue:0x501f
atIndex:0xd90a bufferSize:2];
// ch341_control_out(dev, 0x9a, 0x1312, a);
[self sendControlRequest:0x9a
inDirection:kUSBOut
withValue:0x1312
atIndex:[self calculateBaudrate]
bufferSize:2];
// ch341_control_out(dev, 0xa4, ~(CH341_BIT_RTS | CH341_BIT_DTR), 0);
[self sendControlRequest:0xa4
inDirection:kUSBOut
withValue:~(CH341_BIT_RTS | CH341_BIT_DTR)
atIndex:0
bufferSize:2];
Then I write to pipe 2 using...
kr = (*_usbInterface)->WritePipe(_usbInterface,
2,
(void *) [stringToPrint UTF8String],
(UInt32) strlen([stringToPrint UTF8String])
);
2013-04-17 18:18:39.578 Balance[526:303] Attached Modem Device: USB2.0-Ser!
2013-04-17 18:18:39.580 Balance[526:303] Warning Nil - Vendor: (null) Product:
USB2.0-Ser!
2013-04-17 18:18:39.585 Balance[526:303] device pointer before: 0
2013-04-17 18:18:39.586 Balance[526:303] device pointer after: 71304080
2013-04-17 18:18:39.586 Balance[526:303] Found device (vendor = 6790, product =
29987)
2013-04-17 18:18:39.586 Balance[526:303] Iterating a USB interface
2013-04-17 18:18:39.587 Balance[526:303] Interface class 255, subclass 1
2013-04-17 18:18:39.588 Balance[526:303] Interface has 3 endpoints
2013-04-17 18:18:39.588 Balance[526:303] PipeRef 1:
2013-04-17 18:18:39.588 Balance[526:303] direction in,
2013-04-17 18:18:39.588 Balance[526:303] transfer type bulk,
maxPacketSize 32
2013-04-17 18:18:39.589 Balance[526:303] PipeRef 2:
2013-04-17 18:18:39.589 Balance[526:303] direction out,
2013-04-17 18:18:39.589 Balance[526:303] transfer type bulk,
maxPacketSize 32
2013-04-17 18:18:39.590 Balance[526:303] PipeRef 3:
2013-04-17 18:18:39.590
ANN: new open-source window manager for OS X
Called Windows.app. Source is on github: https://github.com/sdegutis/windowsapp What's particularly neat about it is how you configure it. It looks for a dotfile in your home dir, which can either be JavaScript or CoffeeScript. In this config file you, bind your hot keys as you want, using a very simple API that the app exposes in JS-land. I managed to get JavaScript scripting working via JSCocoa, and CoffeeScript via coffeescript.js and Coffeescript.compile(). Technically I hide the ObjJ syntax away, since most people are much more comfortable in pure JS than in ObjJ. I was looking into adding ClojureScript support, but I'm not yet sure how to avoid the start-up delay when running java. Waiting 5 seconds each time you reload your config isn't ideal. My first choice for scripting was to use MacRuby, but it only works with GC apps, and this one uses ARC. I hear they've got ARC in the works, so my fingers are crossed for the future. Also, PyObjC is really hard to integrate into an app. Ironically enough, when I was googling for how to do it, I found an article I wrote about it 3 years ago when I was working at BNR. Also, I created a technique for generating appcasts statically from the command line, and hosting the appcast on github, that might be interesting to other open source authors who don't want to have any other hosting but github. The details are in this build.sh file: https://github.com/sdegutis/windowsapp/blob/master/build.sh My apologies if new-app announcements are off-topic, but I think this one is particularly suitable for cocoa-dev because of the technical details. -Steven ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
NSScrollView in NSTabView autolayout problem
Hi I have an NSTabView with multiple tabs, each containing an NSScrollView. In the scrollviews I dynamically place custom views which are sized using autolayout and constraints. Now if I add my custom views to a scrollview in tab1 and resize the window with this tab active everything works fine and autolayout does not complain. On the other hand, if I add my custom views to a scrollview in tab1, switch to another tab, resize the window, and switch back to tab1 autolayout breaks with the following exemplar message: Unable to simultaneously satisfy constraints: ( "", "", "", "", "" ) What I noticed in the message is this "H:[NSClipView:0x40120eb80(0)]". How come the NSClipView so in fact contentView of the scrollview has width = 0? My question is, why does the autolayout work fine for the active tab and does for inactive? Thanks k. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: File by index?
On Apr 17, 2013, at 23:28:10, Scott Ribe wrote: > FSGetCatalogInfoBulk, or something like that... I'm pretty sure that won't do it. That's for getting multiple files and there's no way to specify just a single file by its index. -- Steve Mills Drummer, Mac geek ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: File by index?
FSGetCatalogInfoBulk, or something like that... On Apr 17, 2013, at 4:10 PM, Steve Mills wrote: > Hmm, I can't find a more modern way to get the nth file of a folder than > PBGetCatInfoSync that's available in 64-bit. Anybody have a better idea? > > -- > Steve Mills > Drummer, Mac geek > > > ___ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/scott_ribe%40elevated-dev.com > > This email sent to scott_r...@elevated-dev.com > -- Scott Ribe scott_r...@elevated-dev.com http://www.elevated-dev.com/ (303) 722-0567 voice ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Semaphore strangeness
On Apr 17, 2013, at 17:06 , Greg Parker wrote:
> dispatch assumes you are using the semaphore in a lock-like pattern, where
> all waiters are expected to signal when they are done with their work. In
> that pattern, destroying a semaphore whose value is less than its original
> value indicates a bug somewhere (because somebody should have signaled the
> semaphore but has not yet done so). _dispatch_semaphore_dispose() is
> enforcing that assumption and deliberately halting your process if it fails.
One example where the assumption doesn't hold is where the semaphore is
controlling access to AudioQueueBuffers for an AudioQueue. Calling
AudioQueueDispose suppresses further calls of the buffer release callback,
where the semaphore is signaled. After that, you don't get any outstanding
buffers back again, and your semaphore count is borked.
(If you try to use AudioQueueStop first, you then have to orchestrate a *wait*
for all outstanding buffers to arrive at the callback, for no other purpose
than satisfying the count requirement, before destroying the related semaphore.
This adds *harder* synchronization code to solve a problem that never really
existed.)
My assumption would be that, if you're destroying the semaphore, you're
shutting some procedure down, so you likely have taken care of the waiters
already. If you haven't, that's clearly a bug and they're going crash anyway
when they try to signal a nil ivar or an invalid semaphore. There's no point in
crashing at semaphore-disposal time.
Anyway, my workaround is now to signal the semaphore 'originalCount' times
before disposing of it.
On Apr 17, 2013, at 17:55 , Greg Parker wrote:
> There should be a message in the crash log.
>
>if (dsema->dsema_value < dsema->dsema_orig) {
>DISPATCH_CLIENT_CRASH("Semaphore/group object deallocated while in
> use");
>}
I couldn't find one. Maybe the "bad instruction" crash was a failed attempt to
log this message?
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Re: NSOutlineView Travails
On Apr 17, 2013, at 18:08 , Gordon Apple wrote: > Our outlineView is not stable and it sometimes edits the wrong row. FWIW, the several times I saw instability and other odd behavior, it turned out I was doing something to the outline view on a non-main thread. The odd behavior didn't necessarily show up instantly. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSOutlineView Travails
By now, I¹m sure you¹ve seen my second posting. That at least got things showing up in (mostly) the right place. We always had a mixture of bindings and data source, mainly because line numbers were hard to do with bindings. With view=based tables and a little subclassing, it¹s not so hard. For tables, you need the data source because if gives you the item and you can get rowFromItem and feed it back to it (offset by 1). Things are still not right. Our outlineView is not stable and it sometimes edits the wrong row. We want to add a hoverView to show popovers (works for tables), but we need the basics working predictably first. On 4/17/13 4:09 PM, "Quincey Morris" wrote: > On Apr 17, 2013, at 10:50 , Gordon Apple wrote: > >> We are converting tables and outlines to view-based. So far, so good, on >> tables. But NSOutlineView has been a pain. First of all, there is no >> documentation on this, zero, zip, nada, zilch, in the NSOutlineView >> Reference. You have to rely on sample code and NSOutlineView.h. > > Yup, the documentation situation for NSOutlineView is awful. > >> Our outline view has a column/cell identifier ³LineNumber², one for >> ³CheckBox², one for ³Outline². Previously, the latter two were bound to our >> NSTreeController. Converting to views (yes, using >> outlineView:viewForTableColumn:item:), we could not even get the nib to >> load. ObjectValue always came up nil. We tried binding the tableView to >> the tree controller still nil. > > You can't "try" binding here. If you're using a data source, you don't bind > the outline view to the tree controller, and in that case you need to set > view.objectValue to the desired object before returning from > 'outlineView:viewForTableColumn:item:'. > > Otherwise, you *must* bind the outline view's "content" binding to the tree > controller, and the outline view should then maintain "objectValue" for you. > (But since I always use data sources these days, I can't swear that this is > precisely correct.) > >> Ok, after examining sample code, we >> decided that just maybe there was something magic about the column/cell >> identifier ³MainCell², so we changed our third column/cell identifier and >> replaced @²Outline² with @²MainCell² in our code. Amazing now the nib >> loads. However, still no values. > > Since you're talking about loading nibs, I assume you've got code to register > the nib, and I bet you forgot to ensure that the nib is registered with with > the identifier that matches what you're actually using. > > If I remember the details correctly, you're going to invoke > 'makeViewWithIdentifier:owner:' inside 'outlineView:viewForTableColumn:item:'. > When you're using registered nibs, you must use the identifier that the nib is > registered under, and the identifier assigned to the built-in cell view (that > you're not using) is irrelevant. When you're using the built-in cell view, you > must use its identifier, of course. > > The column identifier is basically unrelated, unless you *choose* to configure > it to match the actual cell view identifier. The table view documentation > assumes this is desirable, but I've never found it makes anything much easier. > All it does is provide the opportunity for things to get out of sync, as you > discovered. > >> Even worse, the turn-down dingy appears >> in the first column, not the third where we want it. It does turn down the >> right number of times and depths to match our outline, but is in the wrong >> place and no values. >> >> So how do I get the outline back into the third column and get my >> objectValues to work? > > Are you sure you aren't inadvertently returning a group row view, or a > full-row view? > > -- Gordon Apple Ed4U Little Rock, AR ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Semaphore strangeness
On Apr 17, 2013, at 5:44 PM, Charles Srstka wrote:
> On Apr 17, 2013, at 7:06 PM, Greg Parker wrote:
>>
>> dispatch assumes you are using the semaphore in a lock-like pattern, where
>> all waiters are expected to signal when they are done with their work. In
>> that pattern, destroying a semaphore whose value is less than its original
>> value indicates a bug somewhere (because somebody should have signaled the
>> semaphore but has not yet done so). _dispatch_semaphore_dispose() is
>> enforcing that assumption and deliberately halting your process if it fails.
>
> Then why not use something like an assertion or an exception which could
> actually let the user / developer know why you crashed, instead of just
> EXC_BAD_INSTRUCTION?
There should be a message in the crash log.
if (dsema->dsema_value < dsema->dsema_orig) {
DISPATCH_CLIENT_CRASH("Semaphore/group object deallocated while in
use");
}
--
Greg Parker gpar...@apple.com Runtime Wrangler
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Re: Semaphore strangeness
On Apr 17, 2013, at 7:06 PM, Greg Parker wrote: > On Apr 17, 2013, at 4:14 PM, Quincey Morris > wrote: > >> I'm not sure if this is the right list for this, but then I'm not sure what >> is the right list. >> >> I'm seeing a consistent problem disposing of GCD semaphores. For example, if >> I create a semaphore like this: >> >> semaphore = dispatch_semaphore_create (10); >> >> and then use if for a while, then try to destroy it (using ARC): >> >> semaphore = nil; >> >> If the semaphore's count is less than the original value (10 in the >> example), I get a EXC_BAD_INSTRUCTION crash. >> >> It's not clear to me why it should matter whether the original count has >> been restored. There's nothing waiting on the semaphore -- the operations >> that decremented the count have themselves be disposed of already. >> >> If I forcibly increment the count to 10 *or more*, there's no crash. > > dispatch assumes you are using the semaphore in a lock-like pattern, where > all waiters are expected to signal when they are done with their work. In > that pattern, destroying a semaphore whose value is less than its original > value indicates a bug somewhere (because somebody should have signaled the > semaphore but has not yet done so). _dispatch_semaphore_dispose() is > enforcing that assumption and deliberately halting your process if it fails. Then why not use something like an assertion or an exception which could actually let the user / developer know why you crashed, instead of just EXC_BAD_INSTRUCTION? Charles ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Semaphore strangeness
On Apr 17, 2013, at 4:14 PM, Quincey Morris wrote: > I'm not sure if this is the right list for this, but then I'm not sure what > is the right list. > > I'm seeing a consistent problem disposing of GCD semaphores. For example, if > I create a semaphore like this: > > semaphore = dispatch_semaphore_create (10); > > and then use if for a while, then try to destroy it (using ARC): > > semaphore = nil; > > If the semaphore's count is less than the original value (10 in the example), > I get a EXC_BAD_INSTRUCTION crash. > > It's not clear to me why it should matter whether the original count has been > restored. There's nothing waiting on the semaphore -- the operations that > decremented the count have themselves be disposed of already. > > If I forcibly increment the count to 10 *or more*, there's no crash. dispatch assumes you are using the semaphore in a lock-like pattern, where all waiters are expected to signal when they are done with their work. In that pattern, destroying a semaphore whose value is less than its original value indicates a bug somewhere (because somebody should have signaled the semaphore but has not yet done so). _dispatch_semaphore_dispose() is enforcing that assumption and deliberately halting your process if it fails. -- Greg Parker gpar...@apple.com Runtime Wrangler ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Semaphore strangeness
I'm not sure if this is the right list for this, but then I'm not sure what is the right list. I'm seeing a consistent problem disposing of GCD semaphores. For example, if I create a semaphore like this: semaphore = dispatch_semaphore_create (10); and then use if for a while, then try to destroy it (using ARC): semaphore = nil; If the semaphore's count is less than the original value (10 in the example), I get a EXC_BAD_INSTRUCTION crash: > #0 0x7fff91fcfb5f in _dispatch_semaphore_dispose () > #1 0x7fff91fcc898 in _dispatch_dispose () > #2 0x7fff91fcc837 in -[OS_dispatch_object _xref_dispose] () > 0x7fff91fcfb3e <+> push %rbp > 0x7fff91fcfb3f <+0001> mov%rsp,%rbp > 0x7fff91fcfb42 <+0004> push %rbx > 0x7fff91fcfb43 <+0005> push %rax > 0x7fff91fcfb44 <+0006> mov%rdi,%rbx > 0x7fff91fcfb47 <+0009> mov0x38(%rbx),%rax > 0x7fff91fcfb4b <+0013> cmp0x40(%rbx),%rax > 0x7fff91fcfb4f <+0017> jge0x7fff91fcfb61 > <_dispatch_semaphore_dispose+35> > 0x7fff91fcfb51 <+0019> lea0xa8a6(%rip),%rcx# 0x7fff91fda3fe > 0x7fff91fcfb58 <+0026> mov%rcx,-0x17cbe317(%rip)# > 0x7fff7a311848 > 0x7fff91fcfb5f <+0033> ud2a << Thread 1: Program received signal: > 'EXC_BAD_INSTRUCTION' It's not clear to me why it should matter whether the original count has been restored. There's nothing waiting on the semaphore -- the operations that decremented the count have themselves be disposed of already. If I forcibly increment the count to 10 *or more*, there's no crash. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Detecting application bundle being moved
On Apr 17, 2013, at 4:07 PM, Ken Thomases wrote: >> Question is: what's the easiest way to detect it having been moved? I >> thought I'd get lucky and somewhere there'd be a handy notification, but I >> don't see one. It looks like I'll have to use the FSEvent API? I'm not a fan >> of it, so I'm hoping there's a slimmer solution. > > You can use kqueue() to monitor a vnode for various modifications. In this > case, you'd monitor the directory which contains your app bundle, since > moving it means removing the entry for it from there. Obviously, not all > modifications will be your app being moved, so you'd have to check. Yeah, same deal as FSEvent. > That said, this seems like checking that the user hasn't poured molasses into > their computer's vents. If the user is determined to break their system, > there's nothing you'll be able to do to stop them. They're not determined, they just don't know it'll break things — Finder didn't even warn me when I was doing it. This is not the user's fault and it's happening often enough I want to do something about it. -- Seth Willits ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Detecting application bundle being moved
On Apr 17, 2013, at 5:08 PM, Seth Willits wrote: > I think I've finally figured out that a couple crash patterns are caused by > the user moving my application while it's still running. (I tested it and for > some reason Finder wasn't warning me when I moved it, which is kinda odd.) > > How and why they're moving it is a bit unclear at the moment, but regardless > I'd like to detect it having been moved and throw up an alert and > quit/relaunch the app etc so it won't crash later on. > > Question is: what's the easiest way to detect it having been moved? I thought > I'd get lucky and somewhere there'd be a handy notification, but I don't see > one. It looks like I'll have to use the FSEvent API? I'm not a fan of it, so > I'm hoping there's a slimmer solution. You can use kqueue() to monitor a vnode for various modifications. In this case, you'd monitor the directory which contains your app bundle, since moving it means removing the entry for it from there. Obviously, not all modifications will be your app being moved, so you'd have to check. That said, this seems like checking that the user hasn't poured molasses into their computer's vents. If the user is determined to break their system, there's nothing you'll be able to do to stop them. Regards, Ken ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: File by index?
On Apr 17, 2013, at 3:27 PM, Steve Mills wrote: > Bleah. That looks sufficiently complicated (didn't even show up in Terminal's > man search). I'll just stick with being inefficient if Apple can't provide a > high-level easy-to-use replacement for a routine I and many others used to > use often. To me, readdir/seekdir look pretty darn simple, definitely much simpler than the old PBxxx APIs! I recall those being a real pain in the ass, with the requirement for setting up all those fields of the param block. There's also probably a ton of sample code you can search for, since these functions have been around for literally 30 years. (There's a basic example at the bottom of the man page, actually.) The only issue seems to be that the the position parameter to seekdir may not be as simple as the index of the item in the directory listing; the man page implies it should be treated as an opaque value returned by telldir. If you want to pursue this, the darwin-userlevel list would be the best place to ask. —Jens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: File by index?
On Apr 17, 2013, at 17:17:45, Jens Alfke wrote: > man 3 seekdir Bleah. That looks sufficiently complicated (didn't even show up in Terminal's man search). I'll just stick with being inefficient if Apple can't provide a high-level easy-to-use replacement for a routine I and many others used to use often. Thanks for your help, Jens. -- Steve Mills Drummer, Mac geek ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: File by index?
On Apr 17, 2013, at 3:10 PM, Steve Mills wrote: > Hmm, I can't find a more modern way to get the nth file of a folder than > PBGetCatInfoSync that's available in 64-bit. Anybody have a better idea? man 3 seekdir ? —Jens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: File by index?
Hmm, I can't find a more modern way to get the nth file of a folder than PBGetCatInfoSync that's available in 64-bit. Anybody have a better idea? -- Steve Mills Drummer, Mac geek ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Detecting application bundle being moved
I think I've finally figured out that a couple crash patterns are caused by the user moving my application while it's still running. (I tested it and for some reason Finder wasn't warning me when I moved it, which is kinda odd.) How and why they're moving it is a bit unclear at the moment, but regardless I'd like to detect it having been moved and throw up an alert and quit/relaunch the app etc so it won't crash later on. Question is: what's the easiest way to detect it having been moved? I thought I'd get lucky and somewhere there'd be a handy notification, but I don't see one. It looks like I'll have to use the FSEvent API? I'm not a fan of it, so I'm hoping there's a slimmer solution. -- Seth Willits ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: File by index?
On Apr 17, 2013, at 1:25 PM, Steve Mills wrote: > Sheesh. So Apple has been telling us for years to "go Cocoa!" and "go > 64-bit!", then they go and give us half-baked systems that are nowhere near > close to being replacements for what we had before. Seems like Apple should > take their own advice. The deprecated part of Carbon is the High-Level Toolbox; that's what Apple referred to by telling developers to switch to Cocoa. The CarbonCore APIs are a supported part of the system and there are times when it makes sense to use them, for edge cases or for performance. (Finding a file at a random index in a huge directory is kind of an edge case, you have to admit.) Similarly, NSURLConnection doesn't do everything you can do with POSIX APIs (like UDP or Unix-domain sockets.) CoreAnimation doesn't replace OpenGL. Et cetera. NSFileManager has been steadily gaining capabilities over the years. I remember having to dive into a lot when writing for 10.2 or 10.3, but I haven't had to look at it in a long time. —Jens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Core Data: IN with ordered set of keys?
I have a situation where I want to fetch an ordered array of managed objects which contain an ordered set of keys, and return the result in the same order as the input set: NSOrderedSet * orderedIDs = ...; NSFetchRequest * fetchRequest = [NSFetchRequest fetchRequestWithEntityName:@"MyEntityName"]; NSPredicate * predicate = [NSPredicate predicateWithFormat: @"uuid IN %@", orderedIDs]; NSArray * orderedObjects = [self.database.managedObjectContext executeFetchRequest:fetchRequest error:error]; By 'in the same order', I mean that I would like [[orderedIDs objectAtIndex:i] isEqual:[[orderedObjects objectAtIndex:i] uuid]] == YES for all valid indexes i. I implemented a solution that orders the result after the fetch by iterating through orderedIDs and building a new array, but I feel like there should be a more elegant answer. Any ideas? Thanks! - Dan Treiman ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSOutlineView Travails
We had assumed that outlineView:objectValueForTableColumn:item was not called if the table was bound to a NSTreeController. Wrong assumption. If we returned the correct value, or just eliminated this method, it mostly works correctly. However, there a few anomalies. The outline text indents properly, but the disclosure indicator occasionally (and randomly) appears anywhere it wants within the column/row. Also, scrolling by clicking the bar lower sometimes results in flipping down to the right level, then immediately flipping back up to the view top. On 4/17/13 2:00 PM, "cocoa-dev-requ...@lists.apple.com" wrote: > We are converting tables and outlines to view-based. So far, so good, on > tables. But NSOutlineView has been a pain. First of all, there is no > documentation on this, zero, zip, nada, zilch, in the NSOutlineView Reference. > You have to rely on sample code and NSOutlineView.h. Our outline view has a > column/cell identifier ³LineNumber², one for ³CheckBox², one for ³Outline². > Previously, the latter two were bound to our NSTreeController. Converting to > views (yes, using outlineView:viewForTableColumn:item:), we could not even get > the nib to load. ObjectValue always came up nil. We tried binding the > tableView to the tree controller � still nil. Ok, after examining sample > code, we decided that just maybe there was something magic about the > column/cell identifier ³MainCell², so we changed our third column/cell > identifier and replaced @²Outline² with @²MainCell² in our code. Amazing � > now the nib loads. However, still no values. Even worse, the turn-down dingy > appears in the first column, not the third where we want it. It does turn > down the right number of times and depths to match our outline, but is in the > wrong place and no values. So how do I get the outline back into the third > column and get my objectValues to work? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSOutlineView Travails
On Apr 17, 2013, at 10:50 , Gordon Apple wrote: > We are converting tables and outlines to view-based. So far, so good, on > tables. But NSOutlineView has been a pain. First of all, there is no > documentation on this, zero, zip, nada, zilch, in the NSOutlineView > Reference. You have to rely on sample code and NSOutlineView.h. Yup, the documentation situation for NSOutlineView is awful. > Our outline view has a column/cell identifier ³LineNumber², one for > ³CheckBox², one for ³Outline². Previously, the latter two were bound to our > NSTreeController. Converting to views (yes, using > outlineView:viewForTableColumn:item:), we could not even get the nib to > load. ObjectValue always came up nil. We tried binding the tableView to > the tree controller still nil. You can't "try" binding here. If you're using a data source, you don't bind the outline view to the tree controller, and in that case you need to set view.objectValue to the desired object before returning from 'outlineView:viewForTableColumn:item:'. Otherwise, you *must* bind the outline view's "content" binding to the tree controller, and the outline view should then maintain "objectValue" for you. (But since I always use data sources these days, I can't swear that this is precisely correct.) > Ok, after examining sample code, we > decided that just maybe there was something magic about the column/cell > identifier ³MainCell², so we changed our third column/cell identifier and > replaced @²Outline² with @²MainCell² in our code. Amazing now the nib > loads. However, still no values. Since you're talking about loading nibs, I assume you've got code to register the nib, and I bet you forgot to ensure that the nib is registered with with the identifier that matches what you're actually using. If I remember the details correctly, you're going to invoke 'makeViewWithIdentifier:owner:' inside 'outlineView:viewForTableColumn:item:'. When you're using registered nibs, you must use the identifier that the nib is registered under, and the identifier assigned to the built-in cell view (that you're not using) is irrelevant. When you're using the built-in cell view, you must use its identifier, of course. The column identifier is basically unrelated, unless you *choose* to configure it to match the actual cell view identifier. The table view documentation assumes this is desirable, but I've never found it makes anything much easier. All it does is provide the opportunity for things to get out of sync, as you discovered. > Even worse, the turn-down dingy appears > in the first column, not the third where we want it. It does turn down the > right number of times and depths to match our outline, but is in the wrong > place and no values. > > So how do I get the outline back into the third column and get my > objectValues to work? Are you sure you aren't inadvertently returning a group row view, or a full-row view? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: File by index?
On Apr 17, 2013, at 14:42:25, Jens Alfke wrote: > Go ahead and use the CarbonCore or POSIX APIs (although I think there are > more modern replacements for the PBxxx functions!) Thanks. Yeah, I'm sure there are newer ones - I just didn't spend the time to find them since I found what I was looking for in some really old commented-out code. > NSFileManager is convenient, but it isn't the be-all and end-all of > filesystem access. Sometimes you need to go beneath it. Sheesh. So Apple has been telling us for years to "go Cocoa!" and "go 64-bit!", then they go and give us half-baked systems that are nowhere near close to being replacements for what we had before. Seems like Apple should take their own advice. Yeah, I know they probably can't just rewrite everything all at once, but damn if it isn't annoying to us little folk when they do all this modernization and seemingly waste half their time renaming things (.Mac -> MobileMe -> iCloud) and then don't do the low level stuff. Sorry, I just need to vent once in a while. Still, could be worse - could be Microsoft. -- Steve Mills Drummer, Mac geek ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: File by index?
On Apr 17, 2013, at 11:40 AM, Steve Mills wrote: > Is there any better way to get an indexed file? Ya know, like we could easily > do in Carbon with something like PBGetCatInfoSync by supplying the index in > pb.dirInfo.ioFDirIndex? Go ahead and use the CarbonCore or POSIX APIs (although I think there are more modern replacements for the PBxxx functions!) NSFileManager is convenient, but it isn't the be-all and end-all of filesystem access. Sometimes you need to go beneath it. —Jens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
File by index?
I'm picking random files in folders that might have thousands of files. The
only way I can see to do this in Cocoaland is to get an array of the entire
contents of the folder (NSFileManager contentsOfDirectoryAtPath:error:), then
choose from that array by index. Isn't this terribly wasteful of CPU and memory?
The next best thing I could come up with was to iterate through until I got to
my index. It seems less costly than the above for lower indices, but possibly
more costly for higher indices.
NSDirectoryEnumerator* enumer = [fileMan enumeratorAtPath:foldPath];
NSString* path;
unsigned long n = SSRandomUnsignedLongBetween(0,
folderItem.numItems);
// Loop until our index:
for(i = 0; i < n; i++) {
path = [enumer nextObject];
[enumer skipDescendants];
}
imagePath = [foldPath stringByAppendingFormat:@"/%@", path];
And before anyone points out the uninitted path variable if n is 0, it will
never be 0 due to empty folders being filtered out.
Is there any better way to get an indexed file? Ya know, like we could easily
do in Carbon with something like PBGetCatInfoSync by supplying the index in
pb.dirInfo.ioFDirIndex?
--
Steve Mills
Drummer, Mac geek
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NSOutlineView Travails
We are converting tables and outlines to view-based. So far, so good, on tables. But NSOutlineView has been a pain. First of all, there is no documentation on this, zero, zip, nada, zilch, in the NSOutlineView Reference. You have to rely on sample code and NSOutlineView.h. Our outline view has a column/cell identifier ³LineNumber², one for ³CheckBox², one for ³Outline². Previously, the latter two were bound to our NSTreeController. Converting to views (yes, using outlineView:viewForTableColumn:item:), we could not even get the nib to load. ObjectValue always came up nil. We tried binding the tableView to the tree controller still nil. Ok, after examining sample code, we decided that just maybe there was something magic about the column/cell identifier ³MainCell², so we changed our third column/cell identifier and replaced @²Outline² with @²MainCell² in our code. Amazing now the nib loads. However, still no values. Even worse, the turn-down dingy appears in the first column, not the third where we want it. It does turn down the right number of times and depths to match our outline, but is in the wrong place and no values. So how do I get the outline back into the third column and get my objectValues to work? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Core Animation with NSWindow
On Apr 16, 2013, at 9:40 PM, Ankuj Gupta wrote: > The problem that I have is I cant change the apis for creating the windows. > The only function which I can modify is when we are showing that window. That > is where I need to animate it What exactly is the animation that you need to show? —Jens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
KVO on a managed object called twice in child context
I have an NSManagedObject "masterObject" in my main context with an NSOrderedSet property on it "characterLists". I'm observing that property in a UITableView and making the necessary changes when things are inserted, deleted etc. This has worked fine up until now. I just wrote a data importer which takes the contents of a file and adds it to the database, potentially adding one or more objects to the characterLists property. For ease of isolation I make a new MOC, parent it to the MOC masterObject is in, and then load masterObject into it using its object ID like this NSManagedObjectContext *moc = [ [ NSManagedObjectContext alloc ] initWithConcurrencyType:NSMainQueueConcurrencyType ]; moc.parentContext = database.managedObjectContext; RKCHDBMasterObject *masterObject = database.masterObject; RKCHDBMasterObject *mocMasterObject= (RKCHDBMasterObject*)[ moc objectWithID:masterObject.objectID ]; Then I do all my adds in the child context, moc, and add any new characterLists to the mocMasterObject. If the file parses correctly, I save the child context, else I just toss it away and put up an appropriate error message, the line of code for that is NSError *saveError = nil; if( [ moc save:&saveError ] ) // < HERE [ database saveContext ]; In the case where my file parse causes me to add to 'characterLists', adding just one object, I'm getting *two* KVO insert notifications on the original master object telling me the same object was inserted both times. They are exactly the same call and both of them are in the line highlighted, when saving the child context, it's not even one on the child and one on the master save. It's the same KVO notification, same index set, same type and the 'inserted' object is exactly the same as well, same address, everything. This of course breaks the world because I add a row in my tableview for the same thing twice but the actual characterLists property only gets bigger by one, so the tableview barfs. I'm not registering for KVO twice, I checked that. There are no other KVO messages removing or resetting the thing between the two inserts. If I use the original parent MOC and original masterObject, not a problem, one KVO call. Is there anything obvious I could be doing wrong here or something else I could look for, or am I returning to bugreporter again? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Preventing edits in Versions browser
I assume that NSDocument's isInViewingMode is what I should be asking if the document being used is an actual opened doc or one in the Versions browser. Looking at TextEdit, its document class has an isReadOnly instance variable, but I don't see it getting set to YES even when browsing versions. Yet somehow the Save menu item gets disabled when a browsed version if the active window. But TextEdit doesn't seem to prevent any actual edits from happening, but instantly undoes each edit. So you see the change for a split second. That's not a very good user experience. What does everyone else do? Disable menu items and disallow edits based solely or in part on the isInViewingMode result? Does isInViewingMode ever return YES for reasons other than for docs being browsed in Versions? What about locked files? -- Steve Mills office: 952-818-3871 home: 952-401-6255 cell: 612-803-6157 ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS UI suggestions wanted - Date Picker
Well, do a faux datepicker using a Table View and the gradient overlay to make it look like a datePicker, but one that you can customize a whole lot easier. Yeah, you can't scroll the day/month/year separately, but you can scroll one set of items that represent a range of dates. Lemmie cook up a quick sample for you. Will email offline. On Apr 17, 2013, at 11:21 AM, Rick Aurbach wrote: > Alex, > > You have my attention, I don't really understand what you're suggesting. How > would a gradient overlay to the selection-list UITableView aid the user in > scrolling to a particular date or making a selection? Could you elaborate?? > > Rick Aurbach > > On Apr 17, 2013, at 8:50 AM, Alex Zavatone wrote: > >> What about a UITableView with a gradient overlay that is shaded at the top >> and bottom? >> >> On Apr 17, 2013, at 12:35 AM, Rick Aurbach wrote: >> >>> In my iPad app, I have a number of tableviews in various places which act >>> as selection lists. The user can scroll the list and select the item with a >>> tap, of course. But since some of the lists can be lengthy, I also include >>> navigation aids. In all but one of the lists, the items are alphabetized >>> and the navigation aid is a UISearchBar (I could equally well have used a >>> table index, but I've chosen a UISearchBar instead. I use "scroll to >>> closest text match" logic and it works very well -- the user can usually >>> scroll the list and make the desired selection by typing only one or two >>> characters In most cases.) >>> >>> However, for one of the lists, the table items are items which are sorted >>> by date. The obvious navigation aid in this case is a UIDatePicker, but due >>> to limited screen real estate, I'd rather not use it (since is is so big >>> and can't be easily resized). So I am looking for alternatives. >>> >>> One alternative is to put the UIDatePicker (or perhaps another date picker >>> such as SRMonthPicker or OCCalendar or ??) in a popover. (Presumably, the >>> popover would be triggered by tapping a button or tapping in a >>> UISearchBar.) This is do-able but what I really want is something that is >>> not a popover. Ideally, I'd like something that is permanently part of the >>> view but is only 44 pixels high (like a UISearchBar). Yet it should be easy >>> for users to select at least a year and a month (causing the tableview to >>> scroll the appropriate date range on screen for easy selection). >>> >>> I would be interested to hear from anyone who has encountered a similar >>> situation and has implemented a solution which they find satisfactory. >>> >>> Cheers, >>> >>> Rick Aurbach >>> Aurbach & Associates, Inc. >>> > > > > > ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS UI suggestions wanted - Date Picker
Alex, You have my attention, I don't really understand what you're suggesting. How would a gradient overlay to the selection-list UITableView aid the user in scrolling to a particular date or making a selection? Could you elaborate?? Rick Aurbach On Apr 17, 2013, at 8:50 AM, Alex Zavatone wrote: > What about a UITableView with a gradient overlay that is shaded at the top > and bottom? > > On Apr 17, 2013, at 12:35 AM, Rick Aurbach wrote: > >> In my iPad app, I have a number of tableviews in various places which act as >> selection lists. The user can scroll the list and select the item with a >> tap, of course. But since some of the lists can be lengthy, I also include >> navigation aids. In all but one of the lists, the items are alphabetized and >> the navigation aid is a UISearchBar (I could equally well have used a table >> index, but I've chosen a UISearchBar instead. I use "scroll to closest text >> match" logic and it works very well -- the user can usually scroll the list >> and make the desired selection by typing only one or two characters In most >> cases.) >> >> However, for one of the lists, the table items are items which are sorted by >> date. The obvious navigation aid in this case is a UIDatePicker, but due to >> limited screen real estate, I'd rather not use it (since is is so big and >> can't be easily resized). So I am looking for alternatives. >> >> One alternative is to put the UIDatePicker (or perhaps another date picker >> such as SRMonthPicker or OCCalendar or ??) in a popover. (Presumably, the >> popover would be triggered by tapping a button or tapping in a UISearchBar.) >> This is do-able but what I really want is something that is not a popover. >> Ideally, I'd like something that is permanently part of the view but is only >> 44 pixels high (like a UISearchBar). Yet it should be easy for users to >> select at least a year and a month (causing the tableview to scroll the >> appropriate date range on screen for easy selection). >> >> I would be interested to hear from anyone who has encountered a similar >> situation and has implemented a solution which they find satisfactory. >> >> Cheers, >> >> Rick Aurbach >> Aurbach & Associates, Inc. >> ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS UI suggestions wanted - Date Picker
What about a UITableView with a gradient overlay that is shaded at the top and bottom? On Apr 17, 2013, at 12:35 AM, Rick Aurbach wrote: > In my iPad app, I have a number of tableviews in various places which act as > selection lists. The user can scroll the list and select the item with a tap, > of course. But since some of the lists can be lengthy, I also include > navigation aids. In all but one of the lists, the items are alphabetized and > the navigation aid is a UISearchBar (I could equally well have used a table > index, but I've chosen a UISearchBar instead. I use "scroll to closest text > match" logic and it works very well -- the user can usually scroll the list > and make the desired selection by typing only one or two characters In most > cases.) > > However, for one of the lists, the table items are items which are sorted by > date. The obvious navigation aid in this case is a UIDatePicker, but due to > limited screen real estate, I'd rather not use it (since is is so big and > can't be easily resized). So I am looking for alternatives. > > One alternative is to put the UIDatePicker (or perhaps another date picker > such as SRMonthPicker or OCCalendar or ??) in a popover. (Presumably, the > popover would be triggered by tapping a button or tapping in a UISearchBar.) > This is do-able but what I really want is something that is not a popover. > Ideally, I'd like something that is permanently part of the view but is only > 44 pixels high (like a UISearchBar). Yet it should be easy for users to > select at least a year and a month (causing the tableview to scroll the > appropriate date range on screen for easy selection). > > I would be interested to hear from anyone who has encountered a similar > situation and has implemented a solution which they find satisfactory. > > Cheers, > > Rick Aurbach > Aurbach & Associates, Inc. > > > > > ___ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/zav%40mac.com > > This email sent to z...@mac.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
