March 2012 - Cocoa-dev - lists.apple.com

Convert to Objective-C ARC Syntax Error
by Brad Stone 31 Mar '12

31 Mar '12

I used "Edit->Refactor->Convert to Objective-C ARC...". My app works fine but I'm getting a syntax error in Apple's header files. They're all in the same place: @private. There error is '__strong' only applies to objective-c object or block pointer types; type here is 'void *' Here's an example: /* Quartz Composer Composition Renderer */ @interface QCRenderer : NSObject <QCCompositionRenderer> { @private __strong void* _QCRendererPrivate; } I'm thinking I should remove the __strong from these but I'm wondering why __strong was added here anyway and I'm wary about touching Apple's code. I'm at a loss. Thanks The same things happens in QCPlugIn.h, QCRendered.h, QCCompositionLayer.h, QCView.h, QCCompositionParameterView.h, QCCompositionPickerView.h, QCCompositionPickerPanel.h, QCPLugInViewController.h, IKImageBrowserView.h, IKImageBrowswerCell.h, IKImageBrowserView.h _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: iPad 5.1 simulator
by Roger Dalal 31 Mar '12

31 Mar '12

No, Luca, you can not use the iPod framework in the simulator. On Mar 31, 2012, at 1:10 PM, Luca Ciciriello <luca_ciciriello(a)hotmail.com> wrote: > Is it possible to use MPMediaPickerController with the iOS 5.x simulator? > > I've used it but I get the following exception: > > 'NSInternalInconsistencyException', reason: 'Unable to load iPodUI.framework' > > The code I've used is: > > MPMediaPickerController *picker = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeAny]; > [picker setDelegate:self]; > [picker setAllowsPickingMultipleItems:YES]; > [picker setPrompt:@"Background Music"]; > > [self presentModalViewController:picker animated:YES]; > > Thanks in advance for any answer. > > Luca. > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev(a)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/roger.dalal%40gmail.com > > This email sent to roger.dalal(a)gmail.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Best Way to Append Bytes With Encoding To CFMutableString
by Jean-Daniel Dupas 31 Mar '12

31 Mar '12

Le 31 mars 2012 à 18:20, Andreas Grosam a écrit : > Thank you all for your answers and suggestions. > > My use case is to create CFStrings from Unicode - which in the majority of cases are "short" strings - say, less than 100 characters. In this case, I create an immutable CFString directly in one go. > > Less frequently in the typical use case of the application, I have to deal with larger strings, say base64 encoded images, or something like this. Yet, I need to create a CFString. Since the content will be received over the net, I naturally get content in chunks anyway (namely NSData objects received from a connection). So, in order to avoid a large temporary buffer which holds the complete string, I use a smaller buffer, e.g. 4 KByte and then append this small buffer to the resulting CFString, until it is complete. > If this is to store base64, I would rather use NSData instead of NSString, and even better, I would use a staged base64 decoder that let me decode the data when they arrive, and store the result in NSMutableData > As Greg suggested, I'll try my solution first and test whether it will work efficiently: > > CFStringRef tmp = CFStringCreateWithBytesNoCopy(kCFAllocatorDefault, bytes, numBytes, encoding, NO, kCFAllocatorNull); > CFStringAppend(myMutableString, tmp); > CFRelease(tmp); > > > Nonetheless, if there is a chance that a possible implementation > > void CFStringAppendBytes ( > CFMutableStringRef theString, > const void* bytes, > CFIndex numBytes, > CFStringEncoding encoding > ); > > > will be faster, or uses less memory, I'll also file an enhancement request. > > > > Thanks All! > > Regards > Andreas > > > > On Mar 28, 2012, at 9:24 PM, Greg Parker wrote: > >> On Mar 28, 2012, at 11:00 AM, Charles Srstka <cocoadev(a)charlessoft.com> wrote: >>> Unicode NULL is the least of your problems. In UTF16, each character in the normal ASCII range is going to contain a zero as one of its two bytes (which one, of course, depending on whether the encoding is big- or little-endian). CFStringAppendCString(), along with the other functions that take C strings, stops at the first zero byte it hits, which means that unless your entire file is in a non-Western script, it’s going to get cut short. >>> >>> CFStringAppendCString() is not what you want if you might be using UTF16. >> >> That's right. The first thing CFStringAppendCString() does is call strlen(). >> >> CoreFoundation does have a function internally that would do what you want. You could file a bug report asking for a new API to match. However, it requires almost as much work as using a temporary CFString object anyway, except in some ASCII and UTF-16 cases. I would not expect your CFStringCreateWithBytesNoCopy() solution to be much slower unless you're performing a large number of short appends with one of CFString's preferred encodings. >> >> >> -- >> Greg Parker gparker(a)apple.com Runtime Wrangler > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev(a)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/devlists%40shadowlab.org > > This email sent to devlists(a)shadowlab.org -- Jean-Daniel _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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iPad 5.1 simulator
by Luca Ciciriello 31 Mar '12

31 Mar '12

Is it possible to use MPMediaPickerController with the iOS 5.x simulator? I've used it but I get the following exception: 'NSInternalInconsistencyException', reason: 'Unable to load iPodUI.framework' The code I've used is: MPMediaPickerController *picker = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeAny]; [picker setDelegate:self]; [picker setAllowsPickingMultipleItems:YES]; [picker setPrompt:@"Background Music"]; [self presentModalViewController:picker animated:YES]; Thanks in advance for any answer. Luca. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: drawing lines in and NSTextView
by Salman Khilji 31 Mar '12

31 Mar '12

You may want to look at the freely downloadable Session 114 - Advance Cocoa Text Tip and Tricks from iTunesU in WWDC 2010 videos. It may help. Salman On Mar 31, 2012, at 5:08 AM, Koen van der Drift wrote: > I have an NSTextView to which I want to add some lines that connect > certain words. When the text changes, either by editing, or scrolling, > that lines should follow the words. I thought about using > CoreAnimation, but text in a CATextLayer does not appear to be > editable like the text in an NSTextView (is that correct?). So, an > alternative could be to override drawViewBackgroundInRect and use > NSBezierPaths to draw my lines and I will work on that this weekend. > > Any thoughts or suggestions I may have overlooked? > > - Koen. > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev(a)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/salmankhilji%40yahoo.com > > This email sent to salmankhilji(a)yahoo.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Best Way to Append Bytes With Encoding To CFMutableString
by Andreas Grosam 31 Mar '12

31 Mar '12

Thank you all for your answers and suggestions. My use case is to create CFStrings from Unicode - which in the majority of cases are "short" strings - say, less than 100 characters. In this case, I create an immutable CFString directly in one go. Less frequently in the typical use case of the application, I have to deal with larger strings, say base64 encoded images, or something like this. Yet, I need to create a CFString. Since the content will be received over the net, I naturally get content in chunks anyway (namely NSData objects received from a connection). So, in order to avoid a large temporary buffer which holds the complete string, I use a smaller buffer, e.g. 4 KByte and then append this small buffer to the resulting CFString, until it is complete. As Greg suggested, I'll try my solution first and test whether it will work efficiently: CFStringRef tmp = CFStringCreateWithBytesNoCopy(kCFAllocatorDefault, bytes, numBytes, encoding, NO, kCFAllocatorNull); CFStringAppend(myMutableString, tmp); CFRelease(tmp); Nonetheless, if there is a chance that a possible implementation void CFStringAppendBytes ( CFMutableStringRef theString, const void* bytes, CFIndex numBytes, CFStringEncoding encoding ); will be faster, or uses less memory, I'll also file an enhancement request. Thanks All! Regards Andreas On Mar 28, 2012, at 9:24 PM, Greg Parker wrote: > On Mar 28, 2012, at 11:00 AM, Charles Srstka <cocoadev(a)charlessoft.com> wrote: >> Unicode NULL is the least of your problems. In UTF16, each character in the normal ASCII range is going to contain a zero as one of its two bytes (which one, of course, depending on whether the encoding is big- or little-endian). CFStringAppendCString(), along with the other functions that take C strings, stops at the first zero byte it hits, which means that unless your entire file is in a non-Western script, it’s going to get cut short. >> >> CFStringAppendCString() is not what you want if you might be using UTF16. > > That's right. The first thing CFStringAppendCString() does is call strlen(). > > CoreFoundation does have a function internally that would do what you want. You could file a bug report asking for a new API to match. However, it requires almost as much work as using a temporary CFString object anyway, except in some ASCII and UTF-16 cases. I would not expect your CFStringCreateWithBytesNoCopy() solution to be much slower unless you're performing a large number of short appends with one of CFString's preferred encodings. > > > -- > Greg Parker gparker(a)apple.com Runtime Wrangler _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: drawRect using a Category
by David Duncan 31 Mar '12

31 Mar '12

On Mar 30, 2012, at 8:31 PM, Peter Teeson <pteeson(a)me.com> wrote: > In a Document app I have an NSMatrix. I only need to override drawRect. > Rather than using a sub-class, which seems overkill to me, > I decided to try a Category instead. Categories don't override, they replace. As has already been noted , this means every NSMatrix instance in your app now uses your drawRect:. But it also means you can't have two instances of NSMatrix that had different drawing and you can no longer access the original implementation. -- David Duncan _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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drawing lines in and NSTextView
by Koen van der Drift 31 Mar '12

31 Mar '12

I have an NSTextView to which I want to add some lines that connect certain words. When the text changes, either by editing, or scrolling, that lines should follow the words. I thought about using CoreAnimation, but text in a CATextLayer does not appear to be editable like the text in an NSTextView (is that correct?). So, an alternative could be to override drawViewBackgroundInRect and use NSBezierPaths to draw my lines and I will work on that this weekend. Any thoughts or suggestions I may have overlooked? - Koen. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Audio question
by Luca Ciciriello 31 Mar '12

31 Mar '12

Hi All, I'm using an AVAudioPlayer object to run some Garage Band loop in my App. My question is how to delete the object when I live the view. I've set to "stop" the AVAudioPlayer object when I live to stop the music, but the object is not destroyed. Have I to set "object=nil;" befor exit? Anyway, can I use a garage band loop in my commercial App? Thanks for any answer. Luca. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Problem with NSScrollView and scroll bars
by Leanne Attard 31 Mar '12

31 Mar '12

I am quite a newbie in Cocoa and any help would be appreciated. I am currently doing the main application in java and the drawing in opengl. In order to do this I used the cocoa nsview being given by JAWT (java) and added my custom view (Nativeview) to this view. Then i created an NSOpenGLContext and did the drawing using OpenGL calls such that the drawing is done natively. The problem now is that when in java i open up a window with size larger than the screen, then scroll bars occur with the window however they are not working properly. I have the coordiante system in opengl changed using glOrtho so that the top left corner is (0,0). However the drawing is being made on the window such that my view seems to be pinned at the bottom and the (0,0) for my drawing occurs out above the window. Also when i move the scroll bars no change is being seen, i.e it seems that there is a missing link between my Nativeview and the scroll bars. Does anyone has an idea what am I missing? I tried to use this: ads_subview //my custom NSView avo_winparent //NSView instance given from JAWT [avo_winparent addSubview:ads_subview]; NSScrollView* adsl_scrollview = [ads_subview enclosingScrollView]; [adsl_scrollview setDocumentView:avo_winparent]; [[avo_winparent window] setContentView:adsl_scrollview]; However this made no difference thus I concluded that the document view and content view are already set when the NScrollView is created. Thanks for your help Leanne Attard _______________________________________________ Cocoa-dev mailing list (Cocoa-dev(a)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/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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