On Oct 16, 2013, at 12:48 PM, Eric E. Dolecki wrote:
> I've been asked to make a tableview with 8 rows. Each row has a UISwitch.
> Based on a combination of switch values, the result would be a different
> image displayed to the right of the table (this is for iPad).
>
> How would I best go abo
> I seem to have a loose end though -- when I examine the UIWebView's
> scrollView property, it initially has a non-nil delegate. I don't know if I
> should "interpose" as delegate and after taking my snapshot, call the
> original delegate, or only set myself as a delegate instead of the origin
On 2013-04-22, at 9:04 AM, Motti Shneor wrote:
> To be very precise --- I'd like to know how to be notified about ANY UIView
> visual change. It somehow seems very obvious to me that such "delegate call"
> must exist. Maybe I'm overlooking something very basic here.
I think I had completely m
On 2013-04-22, at 3:26 AM, Motti Shneor wrote:
> Hello everyone. I asked this several times before, but no one gave any hint
> -- I'd like to know if anyone here has any clue, at least where to search for
> an answer.
>
> I need to observe the visible contents of a UIWebView dIsplayed in my i
> This is completely the wrong way to implement a property. The static
> variable will be shared between all instances. Here's how you should be
> doing a lazy loaded var:
>
> @implementation MyClass
> {
>NSDictionary *_someDictionary
> }
>
> - (NSDictionary *)someDictionary
> {
>stat
Looking at the docs, dispatch_once takes care of the synchronization for you:
https://developer.apple.com/library/mac/ipad/#documentation/Performance/Reference/GCD_libdispatch_Ref/Reference/reference.html
It should therefore be thread safe to use without any additional
synchronization code.
Se
I wonder if the problem might be that data is an autoreleased object, which
automatically gets dealloc'ed at the end of the autorelease pool (as explained
in the docs). Have you tried replacing
*error = data
with
*error = [data copy]
and seeing what happens?
On 2012-11-07, at 8:05 AM, Andrea
validation against
Apple's IAP services through our own services. It is really free—we don't even
collect any information we don't absolutely need to run it.
You can find it here: http://www.beeblex.com/
Thanks!
Marco Tabini
416
On 2012-07-18, at 9:08 AM, William Squires wrote:
> Okay, after reading some of the documentation on KVC coding, I understand (I
> think) that the point is to allow me to specify a property of an object with
> an NSString, then set/get that property value using KVC (i.e. valueForKey: or
> se
On 2012-07-11, at 10:03 AM, Dave DeLong wrote:
> It sounds like the OP is looking for a model object that uses an
> NSMutableDictionary as the backing store for its properties, as opposed to
> individual ivars. You can do this.
>
> You declare all your properties, and you declare a single NS
On 2012-07-04, at 1:01 PM, Martin Hewitson wrote:
>
> On 4, Jul, 2012, at 03:22 PM, Marco Tabini wrote:
>
>>> Does anyone have any good suggestions as to how to update my search results
>>> when the underlying source text changes? Do I have to listen for all
>
> Does anyone have any good suggestions as to how to update my search results
> when the underlying source text changes? Do I have to listen for all changes
> from the underlying text objects and try to adapt, or is there a better
> pattern for doing this? Xcode does this nicely: no matter what
I wonder if someone could point me to the right way to profile
poorly-performing custom-drawn UITableView cells. I've come across this problem
several times, and usually manage to figure out how to solve it, but my process
is not very scientific—there's far too much trial and error involved, and
Hi David—
On 2012-04-03, at 6:33 AM, David Delmonte wrote:
> After changing a setting and removing a subview from a UITableDetailView, I
> get crashes when I accidentally swipe the detail view.
Can you reduce this down to a code sample? There is no such thing as a
UITableDetailView (I used to
On 2012-04-02, at 7:15 AM, Rick Mann wrote:
> Thanks for the quick response.
>
> I think I'm okay with sending stuff through the sender parameter, although I
> do agree it's a bit ugly.
>
> Problem is, my didSelectRowAtIndexPath isn't getting called... :-( The
> delegate is set correctly, so
Hi Ray—
> But this seems kludgy and it's using programmer's knowledge, so to speak. I
> watched WWDC2010 session 134 "Optimize your iPhone App for the Retina
> Display" again, searched stackoverflow etc. but I can't find a more elegant
> solution. What would be a more thorough approach? Maybe i
In an attempt to figure out how well gesture recognizers work, I've built a
very simple app that uses a UIPanGestureRecognizer and using them to construct
a UIBezierPath that I then stroke, but I am getting strange artifacts on the
resulting drawing operation (see http://cl.ly/0N2R411O1t1x3w2N3Q
> Can you not just use a free provider, like http://www.startssl.com/?
I'm not an expert, but I think the free cert they provide cannot be used for
code signing.
One other alternative may be the Developer ID initiative that Apple has
announced as part of OS X 10.8 Mountain Lion, but I can't fig
On 2012-03-17, at 9:18 AM, Gerriet M. Denkmann wrote:
> But I want to codesign my OS X apps.
> So how do I get the necessary certificate?
You need to buy it from a certificate authority, like Thawte or Verisign (or
one of the myriad resellers) and they will all be happy to sell you one at
price
> That time has passed now, so you can now completely specify IBOutlets (and
> IBActions) in your implementation file and hide the details from the outside
> world. If you want properties, you can use a class extension like so to add
> them:
Sorry to hijack this conversation, but I've been mean
> I've been reading (and trying out) a few approaches on HTTP communication
> using GCD to do a dispatch_sync or dispatch_async to a dispatch queue or
> using an NSURLRequest.
>
> Which of these is the preferred method for ingesting strings from HTTP URLs
> on iOS? Are there any plusses to one
> I have an array and I am iterating through it using this technique:
>
>> for (id object in array) {
>>// do something with object
>> }
>
> Is there way to obtain the object's current array index position or do I
> have to add a counter?
[array indexOfObject:object] should do the trick, t
> BOOL isTurnableToJSON = [NSJSONSerialization isValidJSONObject: responseData];
> NSLog(@"Is legit for JSON: %d", isTurnableToJSON );
> NSLog(@"Is legit for JSON: %@", isTurnableToJSON ? @"YES" : @"NO"); //
> this is how we handle a bool :/
Are you sure that you are using isTurnable
On 2012-03-06, at 2:51 PM, Jan E. Schotsman wrote:
> Hello,
>
> I have an array of progress values (number objects) for subprojects, from
> which I calculate the overall progress .
> The array is an atomic property of the project class.
>
> Is it safe to access this array from multiple threads,
> The problem is that if you do this in a naive way, with a single huge pixmap,
> you will have poor locality of reference. Once you get to 1024 RGBA pixels
> across, every scan-line will occupy its own memory page. So any operation
> that crosses lots of scan lines but only uses a small fractio
Hi Everyone,
I find myself in the situation of having to manipulate and display a few very
large images in an app running on iOS (potentially in the tens of megapixels at
24 bits/pixel), and I am trying to figure out what the correct pattern for
doing so is. I've Googled for solutions, but the
On 2012-03-01, at 4:18 PM, Sean McBride wrote:
> Hi all,
>
> I have a continuous linear NSSlider who's range is -180 to 180 degrees. I
> don't want tick marks because any value is acceptable. However, the value
> zero is important, and I need for the user to be able to get to exactly 0.0
> (
On 2012-02-11, at 6:25 PM, William Squires wrote:
> is ARC a Lion-only feature or will an ARC-compiled app work on 10.6.8
> assuming no other Lion features are used?
According to Apple, ARC-compiled apps run on SL, but they must be compiled on
Lion, because the SL version of Xcode doesn't inclu
On 2012-01-30, at 5:10 PM, G S wrote:
> So... no one knows how to launch an app on the device with Instruments?
Launch Instruments
Select an iOS instrument
Click “All Processes,” select your device from the list
Click “All Processes” again, choose “Attach to Progress” is the app is already
runn
On 2012-01-27, at 2:14 PM, Jens Alfke wrote:
> I'm really used to using -performSelector:withObject:afterDelay: to make
> something happen later. But I'd much rather use a block than a target/action.
> I can't find any API for this, however. Am I missing something? What I want
> is basically li
On 2012-01-26, at 6:09 PM, Jeff Kelley wrote:
> Without ARC, you would use __block to prevent the block from retaining the
> object and causing the retain cycle. With ARC, however, the object is
> retained when you put it into the variable, so to avoid a retain cycle, you
> have to declare it l
On 2012-01-26, at 3:51 PM, Jan E. Schotsman wrote:
> Hello,
>
> This code is given in the "Transitioning to ARC Release Notes" as an example
> of accomodating blocks in an ARC environment:
>
> __block MyViewController *myController = [[MyViewController alloc] init…];
> // ...
> myController.com
On 2012-01-05, at 1:49 PM, Eric E. Dolecki wrote:
> I'd like to calculate the angle from a center point of a view to a touch
> point.
>
> 0º behind top of screen, 180º being bottom of screen.
>
> Calculating from touchesMoved.
I think you can just retrieve the arctangent between the x axis and
Hi Martin—
On 2011-08-29, at 8:18 AM, Martin Linklater wrote:
> Can anyone point me in the right direction as to how to save my NSImage to a
> PNG file ? Or some documentation which actually describes how to convert the
> NSCGImageSnapshotRep into something I can save out ? I've spent a few hou
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