Memory issues when loading a document
I wonder if this issue is created by our app or if it is inherent in Mac OS X: Our app creates documents which can contain various content per document page, e.g. PDF files. Assume you have created a document with 64 pages, each of them contains a full-page PDF content. The document file's weight is about 1 GB when it is saved. When users try to reload the document on a Mac with 4 GB RAM, it cannot be opened, because of a lack of memory. Tracking the allocations with Instruments, I can see strange things happen: - The app itself consumes about 300 MB RAM. - The document is loaded in several steps, where the first step allocates the document size with -[NSData(NSData) initWithContentsOfFile:]. - Then the RAM for page content files (the PDFs) is allocated and the relevant PDF is being loaded - but: - The first PDF load process allocates additional RAM for the first PDF. - The 2nd PDF allocates additional RAM for the 1st and 2nd PDF. - The 3rd PDF allocates additional RAM for the 1.-3. PDF. - Etc. So this procedure sums up to about 3.5 GB RAM which of course is followed by an exception. On bigger machines, the additional RAM for the PDFs is deallocated after the document has been loaded successfully. Is this a wanted behavior of Mac OS X, or are we able to control how much RAM is being allocated in the document load process? ---Ulf Dunkel ___ 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: Memory issues when loading a document
On 23 Oct 2012, at 11:21, Ulf Dunkel dun...@calamus.net wrote: I wonder if this issue is created by our app or if it is inherent in Mac OS X: Our app creates documents which can contain various content per document page, e.g. PDF files. Assume you have created a document with 64 pages, each of them contains a full-page PDF content. The document file's weight is about 1 GB when it is saved. When users try to reload the document on a Mac with 4 GB RAM, it cannot be opened, because of a lack of memory. Important bit you haven't told us: is your app 32bit, 64bit, or both? Tracking the allocations with Instruments, I can see strange things happen: - The app itself consumes about 300 MB RAM. - The document is loaded in several steps, where the first step allocates the document size with -[NSData(NSData) initWithContentsOfFile:]. - Then the RAM for page content files (the PDFs) is allocated and the relevant PDF is being loaded - but: - The first PDF load process allocates additional RAM for the first PDF. - The 2nd PDF allocates additional RAM for the 1st and 2nd PDF. - The 3rd PDF allocates additional RAM for the 1.-3. PDF. - Etc. So this procedure sums up to about 3.5 GB RAM which of course is followed by an exception. On bigger machines, the additional RAM for the PDFs is deallocated after the document has been loaded successfully. Is this a wanted behavior of Mac OS X, or are we able to control how much RAM is being allocated in the document load process? You have very fine-grained control available to you. Read up on the document architecture and the different NSDocument methods you can override. ___ 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
sync drawing an ever-increasing path
I want to animate the drawing of CGPath in a UIView, so it looks as if it's being drawn. I have the UIView, I have the CGPath, I am able to split the CGPath at any point from 0 to 100% into that which should be drawn and that which shouldn't yet, that's all done, so I can, fairly efficiently, call -(CGPath)[ myObject fractionalPath:(CGFloat)fraction ] and get a path. The idea is to call setNeedsDisplay on the UIView from time to time, then figure out, when I get my -drawRect call how far through the animation I am, call fractionalPath: for that fraction of the total animation time, and draw it. The path isn't that complex, it doesn't take very long to draw and I'm compositing already-fully-drawn paths into a backing UIImage so there's only one 'live one' at any time. The bit I'm not sure about is how to sync this up with the natural framerate of the device. I could call setNeedsDisplay on a timer, or with a delay after each drawRect, but there is surely a better way to do this, is there not? If I do call setNeedsDisplay a lot, will I only get drawRect at most at the natural framerate of the device. Is there an obvious technology I'm missing? This is a pretty simple way to do a quick animation of a single path, so OpenGL or anything like that is massive overkill and I didn't see anything CALayer would give me which would help, but wondered if I'd missed something there as that does have the concept of animating a property, even a custom one, between two values and I wondered if I could hook into that. ___ 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: sync drawing an ever-increasing path
hmm .. actually it looks like I can TOTALLY use CALayer for this. I need a better book, the one I have doesn't cover this. Hitting google. On 23 Oct, 2012, at 7:37 PM, Roland King r...@rols.org wrote: I want to animate the drawing of CGPath in a UIView, so it looks as if it's being drawn. I have the UIView, I have the CGPath, I am able to split the CGPath at any point from 0 to 100% into that which should be drawn and that which shouldn't yet, that's all done, so I can, fairly efficiently, call -(CGPath)[ myObject fractionalPath:(CGFloat)fraction ] and get a path. The idea is to call setNeedsDisplay on the UIView from time to time, then figure out, when I get my -drawRect call how far through the animation I am, call fractionalPath: for that fraction of the total animation time, and draw it. The path isn't that complex, it doesn't take very long to draw and I'm compositing already-fully-drawn paths into a backing UIImage so there's only one 'live one' at any time. The bit I'm not sure about is how to sync this up with the natural framerate of the device. I could call setNeedsDisplay on a timer, or with a delay after each drawRect, but there is surely a better way to do this, is there not? If I do call setNeedsDisplay a lot, will I only get drawRect at most at the natural framerate of the device. Is there an obvious technology I'm missing? This is a pretty simple way to do a quick animation of a single path, so OpenGL or anything like that is massive overkill and I didn't see anything CALayer would give me which would help, but wondered if I'd missed something there as that does have the concept of animating a property, even a custom one, between two values and I wondered if I could hook into that. ___ 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/rols%40rols.org This email sent to r...@rols.org ___ 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
Open untitled file in Document-based app
Hello, I would like my app to open new untitled document every time it starts. It worked in 10.6 but now I upgraded to 10.8 and when I close the window with cmd+w and then restart the application it wont open any windows. Please, how to make it open a new window every time the app starts, regardless of how it exited previously? I tried to return YES in both applicationShouldOpenUntitledFile: and applicationOpenUntitledFile: of the app delegate without luck. Thanks in advance! ___ 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
Running a-foul of bindings with multiple-value subfields
Hello all, I am working my way through trying to understand the correct use of bindings for a non-trivial model. The model I am working on is derived from the contacts database ABPerson. I am unclear how to bind to the elements of a multiple entry list. A person has a handful of direct properties: firstName, lastName, organization, image, etc. There are also three arbitrary length lists of related data: postal addresses, phone numbers, email addresses. I have no trouble using - bind: toObject: withKeyPath: options: for the direct properties. However, try as I might I can't seem to bind to the elements of lists. My question is ought I to be using (or subclassing) an arrayController for each of these lists ? And then binding through the selectedIndex or some such ? I hope this makes enough sense to someone so that they can point me down a lighted path. My code at the moment is a total mess, hence no samples. OSX 10.8 XC 4.5.1 This is a learning exercise so no legacy issues. ___ 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: Memory issues when loading a document
Important bit you haven't told us: is your app 32bit, 64bit, or both? Oh, sorry, it's a 32bit app which still supports at least Mac OS X 10.4.11. We're already working on the 64bit version of that app, but this is a current version's issue which I would like to understand and - hopefully - be able to fix even for the 32bit version. You have very fine-grained control available to you. Read up on the document architecture and the different NSDocument methods you can override. As far as I can see, the loading behavior seems to be very ineffective. Firstly, OS X loads the document. To be able to decode it, it has to be loaded into the RAM. This needs the mentioned 900 MB RAM. Then the Coder decodes the objects which gets the same stuff a second time into the RAM. Finally, when decoding PDFs, OS X creates another data segment for each PDF object, decodes it and creates the PDF content. So we have each PDF object being three times in the RAM: 1) in the loaded raw document, 2) in an object created from the document (containing the PDF raw data), 3) the PDF itself. After this process has been done for the whole document, the RAM is freed again to only keep the required about 900 MB. To me, this seems to be very ineffective. I wonder if there is any way to not decode the document as a kind of monolite, but decode and convert object by object, deallocating RAM after a single object has been created, not when the whole document has been processed. ---Ulf Dunkel ___ 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
App Sandbox Container or Data Directory
I do not understand what is going on with an application's sandboxed container or Data directory. NSHomeDirectory for an OS X sandboxed app points here. ~/Library/Containers/bundle_id/Data The sandbox Data directory is pre-populated with items. Data/Desktop (Alias) Data/Documents Data/Downloads (Alias) Data/Library Data/Movies (Alias) Data/Music (Alias) Data/Pictures(Alias) So here are some of the unusual things. 1. If you specify No Access to the Music, Movies, Pictures, or Downloads folders for the App Sandbox you can still save a document to those folders. So much for the sandbox. 2. When a file is saved to the Documents folder in a save dialog, the file is actually saved to ~/Documents not Data/Documents. So what is Data/Documents for? 3. Data/Documents is pre-populated with an iChat file alias. What is that for? 4. Local log files go in Data/Library/Logs but this location is not visible from Console app. So all local log files are visible from Console except for apps that are sandboxed. How can a user see local sandboxed log files? 5. Data/Library/Preferences is pre-populated with a bunch of preference plist file aliases. One of the items is an alias to com.apple.iWork.Pages.plist. Why would my app need default access to the Pages preference plist file? This seems like a violation of sandboxing. A lot of this simply does not make sense. What am I missing? --Richard Somers ___ 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: App Sandbox Container or Data Directory
On 23 Oct 2012, at 19:13, Richard Somers wrote: I do not understand what is going on with an application's sandboxed container or Data directory. NSHomeDirectory for an OS X sandboxed app points here. ~/Library/Containers/bundle_id/Data The sandbox Data directory is pre-populated with items. Data/Desktop (Alias) Data/Documents Data/Downloads (Alias) Data/Library Data/Movies (Alias) Data/Music (Alias) Data/Pictures(Alias) So here are some of the unusual things. 1. If you specify No Access to the Music, Movies, Pictures, or Downloads folders for the App Sandbox you can still save a document to those folders. So much for the sandbox. What exactly do you mean by “save a document” here? 2. When a file is saved to the Documents folder in a save dialog, the file is actually saved to ~/Documents not Data/Documents. So what is Data/Documents for? Yes, the open/save panels automatically translate any locations form within the container to outside. Anything within the container is not intended for regular users to see. Your app could generate “documents” which get stored on disk in the Documents folder, but provide its own UI for managing that data perhaps, rather than the standard open/save panel approach. 3. Data/Documents is pre-populated with an iChat file alias. What is that for? Does it matter? 4. Local log files go in Data/Library/Logs but this location is not visible from Console app. So all local log files are visible from Console except for apps that are sandboxed. How can a user see local sandboxed log files? How are you generating these logs? 5. Data/Library/Preferences is pre-populated with a bunch of preference plist file aliases. One of the items is an alias to com.apple.iWork.Pages.plist. Why would my app need default access to the Pages preference plist file? This seems like a violation of sandboxing. Some other apps have relied upon this, I would guess. Can your app actually access that plist while running though? Just because it’s there as a symlink doesn’t necessarily mean the app has access to it. ___ 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: sync drawing an ever-increasing path
On Oct 23, 2012, at 4:37 AM, Roland King r...@rols.org wrote: I want to animate the drawing of CGPath in a UIView, so it looks as if it's being drawn. I have the UIView, I have the CGPath, I am able to split the CGPath at any point from 0 to 100% into that which should be drawn and that which shouldn't yet, that's all done, so I can, fairly efficiently, call -(CGPath)[ myObject fractionalPath:(CGFloat)fraction ] and get a path. You can do this with a CAShapeLayer by animating the strokeEnd property. Should be very simple to do, although if your path is very complex it may make more sense to break it into pieces and use multiple shape layers animated sequentially. -- David Duncan ___ 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: sync drawing an ever-increasing path
This worked for me. When initializing your UIView, add an instance variable shapeLayer and do this, shapeLayer = [CAShapeLayer layer]; [[self layer] addSublayer:shapeLayer]; In drawRect, set up your path and do this, CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@strokeEnd]; pathAnimation.duration = 4.0; pathAnimation.fromValue = [NSNumber numberWithFloat:0.0f]; pathAnimation.toValue = [NSNumber numberWithFloat:1.0f]; [shapeLayer addAnimation:pathAnimation forKey:@strokeEndAnimation]; That seems to be all that is needed. David On Oct 23, 2012, at 11:37 AM, David Duncan david.dun...@apple.com wrote: On Oct 23, 2012, at 4:37 AM, Roland King r...@rols.org wrote: I want to animate the drawing of CGPath in a UIView, so it looks as if it's being drawn. I have the UIView, I have the CGPath, I am able to split the CGPath at any point from 0 to 100% into that which should be drawn and that which shouldn't yet, that's all done, so I can, fairly efficiently, call -(CGPath)[ myObject fractionalPath:(CGFloat)fraction ] and get a path. You can do this with a CAShapeLayer by animating the strokeEnd property. Should be very simple to do, although if your path is very complex it may make more sense to break it into pieces and use multiple shape layers animated sequentially. -- David Duncan ___ 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/rowlandd%40sbcglobal.net This email sent to rowla...@sbcglobal.net ___ 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: App Sandbox Container or Data Directory
On Oct 23, 2012, at 1:29 PM, Mike Abdullah cocoa...@mikeabdullah.net wrote: The sandbox is intended to limit what an *app* can do by itself, not what a *user* can do. Users are free to save things wherever they like; the only entitlement that plays a role in that is com.apple.security.files.user-selected.read-only Not true. The user can navigate in the save panel to where ever but saving to an unapproved location will result in an error. The document could not be saved. You don't have permission. As in you’re setting up ASL to write to a specific file within your container? Yes, writing to NSHomeDirectory/Library/Logs using ASL but sandboxed library logs do not show up in Console. I have not tried to access the Pages plist file. I strongly suspect any attempt to access it would fail unless you have a temporary entitlement to do so. You are correct. The Pages plist file is readable but not writable. --Richard Somers ___ 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: sync drawing an ever-increasing path
On Oct 23, 2012, at 12:34 PM, David Rowland rowla...@sbcglobal.net wrote: This worked for me. When initializing your UIView, add an instance variable shapeLayer and do this, shapeLayer = [CAShapeLayer layer]; [[self layer] addSublayer:shapeLayer]; In drawRect, set up your path and do this, There is no need to do this inside of drawRect. In fact by doing so (unless your UIView actually needs to draw something) you've unnecessarily increased your memory footprint and reduce the performance to start the animation. If you want the animation to happen as soon as the view is placed in the window, the correct place to do this is inside of -[UIView didMoveToWindow:]. Just check that the moved to window is not nil (or nothing will happen). CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@strokeEnd]; pathAnimation.duration = 4.0; pathAnimation.fromValue = [NSNumber numberWithFloat:0.0f]; pathAnimation.toValue = [NSNumber numberWithFloat:1.0f]; [shapeLayer addAnimation:pathAnimation forKey:@strokeEndAnimation]; You can also do this implicitly once the layer is in a layer tree by setting the animation duration on the current CATransaction and setting the strokeEnd directly. That seems to be all that is needed. David On Oct 23, 2012, at 11:37 AM, David Duncan david.dun...@apple.com wrote: On Oct 23, 2012, at 4:37 AM, Roland King r...@rols.org wrote: I want to animate the drawing of CGPath in a UIView, so it looks as if it's being drawn. I have the UIView, I have the CGPath, I am able to split the CGPath at any point from 0 to 100% into that which should be drawn and that which shouldn't yet, that's all done, so I can, fairly efficiently, call -(CGPath)[ myObject fractionalPath:(CGFloat)fraction ] and get a path. You can do this with a CAShapeLayer by animating the strokeEnd property. Should be very simple to do, although if your path is very complex it may make more sense to break it into pieces and use multiple shape layers animated sequentially. -- David Duncan ___ 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/rowlandd%40sbcglobal.net This email sent to rowla...@sbcglobal.net -- David Duncan ___ 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: App Sandbox Container or Data Directory
On Tue, Oct 23, 2012, at 01:05 PM, Richard Somers wrote: On Oct 23, 2012, at 1:29 PM, Mike Abdullah cocoa...@mikeabdullah.net wrote: The sandbox is intended to limit what an *app* can do by itself, not what a *user* can do. Users are free to save things wherever they like; the only entitlement that plays a role in that is com.apple.security.files.user-selected.read-only Not true. The user can navigate in the save panel to where ever but saving to an unapproved location will result in an error. The document could not be saved. You don't have permission. If by unapproved you mean my app's sandbox hasn't been extended to include this path then you are incorrect. The user can choose the destination, and the NSURL you get back from the open panel will carry the rights to access that location. If by unapproved you mean the user my app is running as doesn't have write permission to this location, then yes that is expected behavior. --Kyle Sluder ___ 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: App Sandbox Container or Data Directory
On Tue, 23 Oct 2012 12:13:31 -0600, Richard Somers said: ~/Library/Containers/bundle_id/Data *SNIP* A lot of this simply does not make sense. What am I missing? Are you aware that, by default, all of ~/Library is hidden from the user, and it's basically expected that he won't go in that folder? Cheers, -- Sean McBride, B. Eng s...@rogue-research.com Rogue Researchwww.rogue-research.com Mac Software Developer Montréal, Québec, Canada ___ 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: sync drawing an ever-increasing path
There are several paths to be animated. I want each to appear when the user does some action. It seemed the best to but them in a method called by drawRect and redraw the view when something changed. Why would the memory footprint be enlarged? thanks for pointing to didMoveToWindow. David On Oct 23, 2012, at 1:25 PM, David Duncan david.dun...@apple.com wrote: On Oct 23, 2012, at 12:34 PM, David Rowland rowla...@sbcglobal.net wrote: This worked for me. When initializing your UIView, add an instance variable shapeLayer and do this, shapeLayer = [CAShapeLayer layer]; [[self layer] addSublayer:shapeLayer]; In drawRect, set up your path and do this, There is no need to do this inside of drawRect. In fact by doing so (unless your UIView actually needs to draw something) you've unnecessarily increased your memory footprint and reduce the performance to start the animation. If you want the animation to happen as soon as the view is placed in the window, the correct place to do this is inside of -[UIView didMoveToWindow:]. Just check that the moved to window is not nil (or nothing will happen). CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@strokeEnd]; pathAnimation.duration = 4.0; pathAnimation.fromValue = [NSNumber numberWithFloat:0.0f]; pathAnimation.toValue = [NSNumber numberWithFloat:1.0f]; [shapeLayer addAnimation:pathAnimation forKey:@strokeEndAnimation]; You can also do this implicitly once the layer is in a layer tree by setting the animation duration on the current CATransaction and setting the strokeEnd directly. That seems to be all that is needed. David On Oct 23, 2012, at 11:37 AM, David Duncan david.dun...@apple.com wrote: On Oct 23, 2012, at 4:37 AM, Roland King r...@rols.org wrote: I want to animate the drawing of CGPath in a UIView, so it looks as if it's being drawn. I have the UIView, I have the CGPath, I am able to split the CGPath at any point from 0 to 100% into that which should be drawn and that which shouldn't yet, that's all done, so I can, fairly efficiently, call -(CGPath)[ myObject fractionalPath:(CGFloat)fraction ] and get a path. You can do this with a CAShapeLayer by animating the strokeEnd property. Should be very simple to do, although if your path is very complex it may make more sense to break it into pieces and use multiple shape layers animated sequentially. -- David Duncan ___ 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/rowlandd%40sbcglobal.net This email sent to rowla...@sbcglobal.net -- David Duncan ___ 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: sync drawing an ever-increasing path
On Oct 23, 2012, at 2:44 PM, David Rowland rowla...@sbcglobal.net wrote: There are several paths to be animated. I want each to appear when the user does some action. It seemed the best to but them in a method called by drawRect and redraw the view when something changed. Why would the memory footprint be enlarged? Because simply by implementing -drawRect:, your view will now consume pixelWidth * pixelHeight * 4 bytes of memory, and will need to be rendered onto the screen every time something changes. You could do the exact same thing by just implementing an arbitrarily named method that you call instead of -setNeedsDisplay without the overhead. thanks for pointing to didMoveToWindow. David On Oct 23, 2012, at 1:25 PM, David Duncan david.dun...@apple.com wrote: On Oct 23, 2012, at 12:34 PM, David Rowland rowla...@sbcglobal.net wrote: This worked for me. When initializing your UIView, add an instance variable shapeLayer and do this, shapeLayer = [CAShapeLayer layer]; [[self layer] addSublayer:shapeLayer]; In drawRect, set up your path and do this, There is no need to do this inside of drawRect. In fact by doing so (unless your UIView actually needs to draw something) you've unnecessarily increased your memory footprint and reduce the performance to start the animation. If you want the animation to happen as soon as the view is placed in the window, the correct place to do this is inside of -[UIView didMoveToWindow:]. Just check that the moved to window is not nil (or nothing will happen). CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@strokeEnd]; pathAnimation.duration = 4.0; pathAnimation.fromValue = [NSNumber numberWithFloat:0.0f]; pathAnimation.toValue = [NSNumber numberWithFloat:1.0f]; [shapeLayer addAnimation:pathAnimation forKey:@strokeEndAnimation]; You can also do this implicitly once the layer is in a layer tree by setting the animation duration on the current CATransaction and setting the strokeEnd directly. That seems to be all that is needed. David On Oct 23, 2012, at 11:37 AM, David Duncan david.dun...@apple.com wrote: On Oct 23, 2012, at 4:37 AM, Roland King r...@rols.org wrote: I want to animate the drawing of CGPath in a UIView, so it looks as if it's being drawn. I have the UIView, I have the CGPath, I am able to split the CGPath at any point from 0 to 100% into that which should be drawn and that which shouldn't yet, that's all done, so I can, fairly efficiently, call -(CGPath)[ myObject fractionalPath:(CGFloat)fraction ] and get a path. You can do this with a CAShapeLayer by animating the strokeEnd property. Should be very simple to do, although if your path is very complex it may make more sense to break it into pieces and use multiple shape layers animated sequentially. -- David Duncan ___ 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/rowlandd%40sbcglobal.net This email sent to rowla...@sbcglobal.net -- David Duncan -- David Duncan ___ 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: Open untitled file in Document-based app
On 24/10/2012, at 2:31 AM, ecir hana ecir.h...@gmail.com wrote: I tried to return YES in both applicationShouldOpenUntitledFile: and applicationOpenUntitledFile: of the app delegate without luck. If you return YES from -applicationOpenUntitledFile: the application will NOT open a new file - it has assumed that this method has done it and by returning YES that's what you're telling it. You want to either return NO or else not override this method at all. --Graham ___ 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: App Sandbox Container or Data Directory
On Oct 23, 2012, at 2:43 PM, Kyle Sluder k...@ksluder.com wrote: If by unapproved you mean my app's sandbox hasn't been extended to include this path then you are incorrect. The user can choose the destination, and the NSURL you get back from the open panel will carry the rights to access that location. If by unapproved you mean the user my app is running as doesn't have write permission to this location, then yes that is expected behavior. I sandboxed my app in Xcode. In the app target entitlement area there are access control options for Music, Movies, Pictures, and Downloads folders. Access to these folders remained the default No Access. I launched the app and and saved a new document. In the save panel the Music folder was showing as a Recent Place. I selected this as the save location and saving was a success. As a developer, based on the entitlement settings, I was expecting failure. Saving a new document to the users home directory (choose the home directory in the save panel) resulted in failure. The document could not be saved. You don't have permission. As a developer this is what I expected. From a users point of view I was surprised that the save panel let the user choose a location where a save was not allowed and subsequently would result in failure. --Richard Somers ___ 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: sync drawing an ever-increasing path
On 24 Oct, 2012, at 2:37 AM, David Duncan david.dun...@apple.com wrote:
On Oct 23, 2012, at 4:37 AM, Roland King r...@rols.org wrote:
I want to animate the drawing of CGPath in a UIView, so it looks as if it's
being drawn. I have the UIView, I have the CGPath, I am able to split the
CGPath at any point from 0 to 100% into that which should be drawn and that
which shouldn't yet, that's all done, so I can, fairly efficiently, call
-(CGPath)[ myObject fractionalPath:(CGFloat)fraction ] and get a path.
You can do this with a CAShapeLayer by animating the strokeEnd property.
Should be very simple to do, although if your path is very complex it may
make more sense to break it into pieces and use multiple shape layers
animated sequentially.
--
David Duncan
Thanks David, my shape is a bit complex for the strokeEnd property animation, I
need to slowly and accurately 'trace' the outline of a path which has multiple
elements and contains several closed paths. I already did the math to give me
the first x% of the path, efficiently, even splitting any last bezier into a
partial, so I'm happy with that bit, just needed to draw these partial and
growing paths in sequence. Also I need the path to join correctly as it bends,
so drawing it as one path, not different paths on different layers, is optimal.
So I made a custom CALayer, gave it a 'percentage' property, made that
@dynamic. I set needsDisplayForKey: to return YES for @percentage so I get
the redraw calls and implemented drawInContext: so that it fetches
self.percentage, gets the path for that percentage and draws it. This works.
The one thing I had trouble with was getting the animation to start and animate
between whatever percentage was and whatever I set it to, the UIViewController
just does layer.percentage=1 and expects that to animate. Eventually I found
actionForKey: and overrode that method to return a CABasicAnimation .. like this
-(idCAAction)actionForKey:(NSString*)key
{
if( [ key isEqualToString:@percentage ] )
{
CABasicAnimation *anim = [ CABasicAnimation
animationWithKeyPath:@percentage ];
anim.duration = 2.0f;
anim.fromValue = [ self.presentationLayer valueForKey:key ];
// --- why oh why
return anim;
}
else
return [ super actionForKey:key ];
}
Two things I don't understand here.
First, why do I have to set the fromValue? I found without doing that, I don't
get an animation, it just jumps instantly to the final point and draws the
whole path? But the documentation for CABasicAnimation says that if fromValue,
toValue and byValue are all nil, it should animate from the previous value of
keypath to the new value, which is what I want, but doesn't do it. I got stuck
on this for ages until I googled up an example showing how to get the current
value off the presentation layer and set anim.fromValue, then it works.
Secondly, [ self.presentationLayer valueForKey:@percentage ] gives me the
current value of percentage, which I use for fromValue, fortunately I don't
need to set toValue, that it manages to do itself, but if I did want the 'new'
value of percentage, how could I get it at that point? I've tried the model
layer and everything else I can think of. Is the 'new' value of percentage
available at all at the point of actionForKey being called?.
Or is actionForKey: the wrong place to return this animation?
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Security-scoped bookmarks linked to code signing?
I'm using security-scoped bookmarks to save the location of certain folders between launches so that my sandboxed app works properly. We've had reports that resolving these bookmarks sometimes crashes deep inside the security-scoping resolution but I have been unable to reproduce this. But one clue is that the apps that exhibit this problem were incorrectly codesigned (using the wrong developer certificate), and I was wondering if there was a connection between resolving SS bookmarks and codesigning. If there is that's probably the answer, but if not I'll know to keep looking for another reason. --Graham ___ 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: How to programmatically detect that Mission Control is running?
On Oct 22, 2012, at 1:05 AM, Daiwei Li wrote: You should rely on key repeat events to let you know that you need to continue to respond to the key press. For mouse events, you should request periodic events. Could you point me towards the APIs that let me get key repeat and periodic mouse events? So long as a key is held down, your app will continue to receive NSKeyDown events. -[NSEvent isARepeat] returns TRUE for the repeat events. You don't get periodic mouse events. You can request to receive NSPeriodic events. That's the standard way of continuing to do some action for as long as the mouse button is held down. The canonical example from the docs is now outdated, but it was clicking on the arrow at the end of a scroll bar. Assuming the user doesn't move the mouse while holding the button down, there would not normally be a continuing stream of events to cause scrolling to continue for the duration. So, the app should request periodic events so long as the mouse is down inside the button. For the key repeat events, I strongly suspect you will stop receiving those when Mission Control activates. I'm less sure about the periodic events. Although if you keep receiving those, you can probably check if the mouse is still on/over your app's control. Perhaps using +[NSWindow windowNumberAtPoint:belowWindowWithWindowNumber:]. 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
