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• WWDC : Apple dévoile Metal, une nouvelle bibliothèque graphique pour améliorer les performances de rendu CPU sur les périphériques iOS

  WWDC : Apple dévoile Metal, une nouvelle bibliothèque graphique Son but est d'améliorer les performances de rendu sur CPU pour les périphériques sous iOSDurant la conférence WWDC 2014 (Apple Worldwide Developers Conference), Apple a annoncé une nouvelle bibliothèque graphique bas niveau à l'image de Mantle, appelée Metal. Le but est de drastiquement améliorer les performances de rendu sur CPU, pour les périphériques sous iOS. À cette occasion, Apple a travaillé avec Epic Games afin de produire...

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• AppDays Paris : Windows Phone, iOS et Android à l'honneur de la conférence des développeurs d'applications mobiles en novembre

  AppDays : les développeurs d'applications mobiles ont leur conférence Windows Phone, iOS et Android à l'honneur le 9 novembre « Applification du web », montée en puissance des galeries d'applications mobiles, augmentation des performances des OS mobiles. Autant de signes qui montrent que l'avenir du développement ne passera peut-être pas que par les Smartphones et les tablettes, mais qu'il passera immanquablement par eux. Des applications très pro (comme celles de SAP, l'éditeur allemand qui a bien saisi l'importance de cette tendance de fond) aux jeux les plus réalistes (comme Infinite Flight, un vrai simulateur d...

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• Un quart de milliard de smartphones vendus au troisième trimestre, Android et iOS peinent à gagner des parts pendant que Windows Phone progresse

  Un quart de milliard de smartphones vendus au troisième trimestre, Android et iOS peinent à gagner des parts pendant que Windows Phone progresse Les rapports de vente de smartphones au troisième trimestre de l'année en cours se multiplient. Cette fois-ci, c'est l'entreprise indépendante d'analyse Canalys qui révèle à son tour une augmentation annuelle de 44% du marché. Cette proportion représente un quart de milliards de dispositifs écoulés en un trimestre sur la planète. Sans surprise,...

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• Caching with AVPlayer and AVAssetExportSession

  - by tba

  I would like to cache progressive-download videos using AVPlayer. How can I save an AVPlayer's item to disk? I'm trying to use AVAssetExportSession on the player's currentItem (which is fully loaded). This code is giving me "AVAssetExportSessionStatusFailed (The operation could not be completed)" : AVAsset *mediaAsset = self.player.currentItem.asset; AVAssetExportSession *es = [[AVAssetExportSession alloc] initWithAsset:mediaAsset presetName:AVAssetExportPresetLowQuality]; NSString *outPath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"out.mp4"]; NSFileManager *fileManager = [NSFileManager defaultManager]; [fileManager removeItemAtPath:outPath error:NULL]; es.outputFileType = @"com.apple.quicktime-movie"; es.outputURL = [[[NSURL alloc] initFileURLWithPath:outPath] autorelease]; NSLog(@"exporting to %@",outPath); [es exportAsynchronouslyWithCompletionHandler:^{ NSString *status = @""; if( es.status == AVAssetExportSessionStatusUnknown ) status = @"AVAssetExportSessionStatusUnknown"; else if( es.status == AVAssetExportSessionStatusWaiting ) status = @"AVAssetExportSessionStatusWaiting"; else if( es.status == AVAssetExportSessionStatusExporting ) status = @"AVAssetExportSessionStatusExporting"; else if( es.status == AVAssetExportSessionStatusCompleted ) status = @"AVAssetExportSessionStatusCompleted"; else if( es.status == AVAssetExportSessionStatusFailed ) status = @"AVAssetExportSessionStatusFailed"; else if( es.status == AVAssetExportSessionStatusCancelled ) status = @"AVAssetExportSessionStatusCancelled"; NSLog(@"done exporting to %@ status %d = %@ (%@)",outPath,es.status, status,[[es error] localizedDescription]); }]; How can I export successfully? I'm looking into copying mediaAsset into an AVMutableComposition, but haven't had much luck with that either. Thanks! PS: Here are some questions from people trying to accomplish the same thing (but with MPMoviePlayerController): Cache Progressive downloaded content in MPMoviePlayerController Simultaneously stream and save a video? Caching videos to disk after successful preload by MPMoviePlayerController

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• Zebra (ZSDK_API) 1.1.5266 Issue in XCode 4.6

  - by Poisydon

  Basically I'm having this error after I import the Zebra library in Xcode 4.6 Undefined symbols for architecture armv7: "_OBJC_CLASS_$_Linea", referenced from: objc-class-ref in libZSDK_API.a(LineaBtPrinterConnection.o) (maybe you meant: _OBJC_CLASS_$_LineaBtPrinterConnection) ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation) was wondering if anyone have encountered this issue with this version (1.1.5266) of the ZSDK_API. if anyone knows how to fix this, please post your instructions. My Thanks.

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• Setting int more than once causes crash

  - by JulianB

  I'm doing a CABasicAnimation and getting the value from a nested NSMutableArray. Everything is great the first time it runs but crashes when called again either with custom functions or viewDidLoad. I've isolated it down to this line int int1 = [[[locationsArray objectAtIndex:0] objectAtIndex:0 ]integerValue] ; I assume it's to do with int not being a pointer but I'm lost as have to get the value without crashing the second time around Process: CEO Report 2011 [61880] Path: /Users/julian/Library/Application Support/iPhone Simulator/4.2/Applications/03CFB7BC-0722-4CA0-9E7D-39772AEEF444/CEO Report 2011.app/CEO Report 2011 Identifier: CEO Report 2011 Version: ??? (???) Code Type: X86 (Native) Parent Process: launchd [252] Date/Time: 2011-11-13 17:04:28.093 +0000 OS Version: Mac OS X 10.6.8 (10K549) Report Version: 6 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x000000005079706f Crashed Thread: 0 Dispatch queue: com.apple.main-thread Application Specific Information: objc_msgSend() selector name: objectAtIndex: iPhone Simulator 235, iPhone OS 4.2 (iPad/8C134) Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 libobjc.A.dylib 0x012f1a78 objc_msgSend + 44 1 CEO Report 2011 0x0001afbd -[TalentRVC doBoxes:] + 61 (TalentRVC.m:594) 2 CEO Report 2011 0x00017025 -[TalentRVC locationSelected:] + 1123 (TalentRVC.m:137) 3 CEO Report 2011 0x0001659f -[TalentRVC segmentedControlIndexChangedA] + 290 (TalentRVC.m:53) 4 UIKit 0x002fba6e -[UIApplication sendAction:to:from:forEvent:] + 119 5 UIKit 0x0038a1b5 -[UIControl sendAction:to:forEvent:] + 67 6 UIKit 0x0038c647 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527 7 UIKit 0x0038a16c -[UIControl sendActionsForControlEvents:] + 49 8 UIKit 0x003c96b2 -[UISegmentedControl setSelectedSegmentIndex:] + 574 9 UIKit 0x003ce17e -[UISegmentedControl touchesBegan:withEvent:] + 971 10 UIKit 0x00320025 -[UIWindow _sendTouchesForEvent:] + 395 11 UIKit 0x0030137a -[UIApplication sendEvent:] + 447 12 UIKit 0x00306732 _UIApplicationHandleEvent + 7576 13 GraphicsServices 0x01a5ca36 PurpleEventCallback + 1550 14 CoreFoundation 0x01171064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52 15 CoreFoundation 0x010d16f7 __CFRunLoopDoSource1 + 215 16 CoreFoundation 0x010ce983 __CFRunLoopRun + 979 17 CoreFoundation 0x010ce240 CFRunLoopRunSpecific + 208 18 CoreFoundation 0x010ce161 CFRunLoopRunInMode + 97 19 GraphicsServices 0x01a5b268 GSEventRunModal + 217 20 GraphicsServices 0x01a5b32d GSEventRun + 115 21 UIKit 0x0030a42e UIApplicationMain + 1160 22 CEO Report 2011 0x00002864 main + 102 (main.m:14) 23 CEO Report 2011 0x000027f5 start + 53 Thread 1: Dispatch queue: com.apple.libdispatch-manager 0 libSystem.B.dylib 0x98a10382 kevent + 10 1 libSystem.B.dylib 0x98a10a9c _dispatch_mgr_invoke + 215 2 libSystem.B.dylib 0x98a0ff59 _dispatch_queue_invoke + 163 3 libSystem.B.dylib 0x98a0fcfe _dispatch_worker_thread2 + 240 4 libSystem.B.dylib 0x98a0f781 _pthread_wqthread + 390 5 libSystem.B.dylib 0x98a0f5c6 start_wqthread + 30 Thread 2: WebThread 0 libSystem.B.dylib 0x989e9afa mach_msg_trap + 10 1 libSystem.B.dylib 0x989ea267 mach_msg + 68 2 CoreFoundation 0x011714a6 __CFRunLoopServiceMachPort + 150 3 CoreFoundation 0x010ce874 __CFRunLoopRun + 708 4 CoreFoundation 0x010ce240 CFRunLoopRunSpecific + 208 5 CoreFoundation 0x010ce161 CFRunLoopRunInMode + 97 6 WebCore 0x023e1423 RunWebThread(void*) + 499 7 libSystem.B.dylib 0x98a17259 _pthread_start + 345 8 libSystem.B.dylib 0x98a170de thread_start + 34 Thread 3: 0 libSystem.B.dylib 0x989e9afa mach_msg_trap + 10 1 libSystem.B.dylib 0x989ea267 mach_msg + 68 2 CoreFoundation 0x011714a6 __CFRunLoopServiceMachPort + 150 3 CoreFoundation 0x010ce874 __CFRunLoopRun + 708 4 CoreFoundation 0x010ce240 CFRunLoopRunSpecific + 208 5 CoreFoundation 0x010ce161 CFRunLoopRunInMode + 97 6 Foundation 0x0009b162 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 398 7 Foundation 0x00065d4c -[NSThread main] + 81 8 Foundation 0x00065cd8 __NSThread__main__ + 1387 9 libSystem.B.dylib 0x98a17259 _pthread_start + 345 10 libSystem.B.dylib 0x98a170de thread_start + 34 Thread 4: com.apple.CFSocket.private 0 libSystem.B.dylib 0x98a08ac6 select$DARWIN_EXTSN + 10 1 CoreFoundation 0x01102cbc __CFSocketManager + 812 2 libSystem.B.dylib 0x98a17259 _pthread_start + 345 3 libSystem.B.dylib 0x98a170de thread_start + 34 Thread 5: 0 libSystem.B.dylib 0x98a0f412 __workq_kernreturn + 10 1 libSystem.B.dylib 0x98a0f9a8 _pthread_wqthread + 941 2 libSystem.B.dylib 0x98a0f5c6 start_wqthread + 30 Thread 0 crashed with X86 Thread State (32-bit): eax: 0x5079706f ebx: 0x0001af8c ecx: 0x04c8a1ff edx: 0x00200855 edi: 0x010bfbd0 esi: 0x56e58955 ebp: 0xbfffd408 esp: 0xbfffd3d4 ss: 0x0000001f efl: 0x00010206 eip: 0x012f1a78 cs: 0x00000017 ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037 cr2: 0x5079706f Binary Images: 0x1000 - 0x29ffb +CEO Report 2011 ??? (???) <C5838026-29D3-AF1E-8C66-F7F5C18CDDD2> /Users/julian/Library/Application Support/iPhone Simulator/4.2/Applications/03CFB7BC-0722-4CA0-9E7D-39772AEEF444/CEO Report 2011.app/CEO Report 2011 0x4a000 - 0x4cff7 +PBGDBIntrospectionSupport.A.dylib 1760.0.0 (compatibility 1.0.0) <C80BE225-06F2-4CB3-BF89-84A1B0FDCDA2> /Developer-3/Applications/Xcode.app/Contents/PlugIns/GDBMIDebugging.xcplugin/Contents/Resources/PBGDBIntrospectionSupport.A.dylib 0x51000 - 0x212fe7 +Foundation 751.49.0 (compatibility 300.0.0) <DB9A4461-C768-9B7B-E463-4568E3FAA179> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/Foundation.framework/Foundation 0x2ef000 - 0x7fbff3 +UIKit 1400.0.0 (compatibility 1.0.0) <EE783C53-A647-D7F8-62CF-FB3F7DD16C54> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/UIKit.framework/UIKit 0xa40000 - 0xc73ff7 com.apple.CoreGraphics 1.600.0 (???) <78926D2F-9A6C-8B48-BD99-72B3373872BD> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CoreGraphics.framework/CoreGraphics 0xcdc000 - 0xe3affb +CoreData 320.15.0 (compatibility 1.0.0) <75D8B19C-E452-CB13-87FA-CBFD44D3A04F> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CoreData.framework/CoreData 0xeb3000 - 0xefdffb +SystemConfiguration 379.0.0 (compatibility 1.0.0) <5A1E5868-7B70-7184-F4F6-B0FC574E49A0> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration 0xf1c000 - 0x100efef +QuartzCore 1.7.0 (compatibility 1.2.0) <FCA6F109-11B7-B38B-4EBF-D5C2CA9D5CE7> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/QuartzCore.framework/QuartzCore 0x1079000 - 0x108aff7 +libSystem.dylib 125.0.0 (compatibility 1.0.0) <76CE85FC-AAC8-DE1C-B533-ABCEF8783B8F> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libSystem.dylib 0x109d000 - 0x11ecfef +CoreFoundation 550.52.0 (compatibility 150.0.0) <CDA305C1-38E1-514F-0EFB-4B6A58E296D5> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 0x12de000 - 0x13abfe3 +libobjc.A.dylib 227.0.0 (compatibility 1.0.0) <FEB8BB90-29E8-F87A-EA47-9395667DA191> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libobjc.A.dylib 0x13fd000 - 0x15a3fe7 +libicucore.A.dylib 45.0.0 (compatibility 1.0.0) <05674AB8-3A5A-0D89-79F8-EA0817A32D38> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libicucore.A.dylib 0x160f000 - 0x170efe7 +libxml2.2.dylib 10.3.0 (compatibility 10.0.0) <08B31BB7-E603-0C9A-1D7D-17637EFEDA54> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libxml2.2.dylib 0x1733000 - 0x1741ff7 +libz.1.dylib 1.2.3 (compatibility 1.0.0) <F91C1567-31B2-CEFD-2D61-1B76C9F89E6A> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libz.1.dylib 0x1746000 - 0x188cff7 +CFNetwork 485.12.7 (compatibility 1.0.0) <FCD41C21-04EF-CDBB-84AC-9017DC3BF552> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CFNetwork.framework/CFNetwork 0x190a000 - 0x196efeb +Security ??? (???) <1D093A0E-0E15-231C-F11D-0645230EF7A1> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/Security.framework/Security 0x1996000 - 0x1999ff7 +IOKit 275.0.0 (compatibility 1.0.0) <E244134E-FFD4-D9C4-BF8E-E1235C0C17B7> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/IOKit.framework/IOKit 0x19a1000 - 0x19b7ff7 +libSystem.override.dylib ??? (???) <477EA8CC-61D1-D179-A7B6-2BB7C377600B> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/system/libSystem.override.dylib 0x19c2000 - 0x1a43ffb +libsqlite3.dylib 9.6.0 (compatibility 9.0.0) <BCEA48F2-1BF3-BD41-F3D8-D905806BFA57> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libsqlite3.dylib 0x1a55000 - 0x1a65fe3 +GraphicsServices 14.0.0 (compatibility 1.0.0) <BA0B832B-2252-0434-BFD7-99415BEDF76B> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices 0x1a76000 - 0x1c13ff3 +JavaScriptCore 533.17.9 (compatibility 1.0.0) <8B97277F-F677-F9B0-F82F-5E1E608EFA84> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/JavaScriptCore.framework/JavaScriptCore 0x1c66000 - 0x1d47ffb +ImageIO ??? (???) <6FAE198A-EAC4-9FBF-A922-1DF8200FD269> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/ImageIO.framework/ImageIO 0x1d71000 - 0x1dbdff3 +AddressBook 30.0.0 (compatibility 1.0.0) <A011434A-1249-3B7D-97EF-08F0AA0EFBB3> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/AddressBook.framework/AddressBook 0x1de7000 - 0x1f7efe7 +AudioToolbox 296.0.0 (compatibility 1.0.0) <C35F6411-41EB-92EC-F0E1-E3328746061D> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/AudioToolbox.framework/AudioToolbox 0x1fd2000 - 0x1fe5fff +SpringBoardServices ??? (???) <AE58FA0A-B824-CF60-3F40-4CEBBFC2F236> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices 0x1ff1000 - 0x2034ffb +AppSupport 29.0.0 (compatibility 1.0.0) <1B38F0B4-36BB-5BEB-917A-A5CFBFCEDADA> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/AppSupport.framework/AppSupport 0x2059000 - 0x20c7fe3 +CoreText ??? (???) <EE0D05CA-772A-9D07-7931-06B948B209D5> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CoreText.framework/CoreText 0x20f4000 - 0x2136feb +MobileCoreServices 20.0.0 (compatibility 1.0.0) <0F2407B2-C515-C6AC-B72B-0BA21568B152> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices 0x2150000 - 0x2231ff7 +WebKit 533.17.9 (compatibility 1.0.0) <C2BA78C7-45EC-54AA-E020-D7FD6ECE06F9> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/WebKit.framework/WebKit 0x22a9000 - 0x3090ffb +WebCore 533.17.9 (compatibility 1.0.0) <D9EEBA8C-F9D4-FAF4-E0BF-58CE7DAAFB96> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/WebCore.framework/WebCore 0x358c000 - 0x363ffe3 +ProofReader 101.0.0 (compatibility 1.0.0) <196C8CFD-C6BA-A5DE-5785-7F6042DC6425> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/ProofReader.framework/ProofReader 0x3656000 - 0x3659ff7 +libAccessibility.dylib ??? (???) <BFB0EA39-9E6F-026C-0C23-66A12AB3D336> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libAccessibility.dylib 0x3661000 - 0x368fff7 +PrintKit 66.0.0 (compatibility 1.0.0) <F171F166-8B5C-FBC7-497E-9DCDEB158348> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/PrintKit.framework/PrintKit 0x36a3000 - 0x3724fe3 +CoreTelephony 383.8.3 (compatibility 1.0.0) <7BEDF930-9CA4-E6A2-BBCE-C6E7A14DEE69> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CoreTelephony.framework/CoreTelephony 0x3767000 - 0x3768fff +DataMigration ??? (???) <87E44081-5DCB-6597-6865-90780FEB8597> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/DataMigration.framework/DataMigration 0x376d000 - 0x3770ff7 +MobileInstallation ??? (???) <DFD90490-F485-6945-1ABE-F4D6C7A94574> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation 0x3776000 - 0x37aafff +Bom 157.0.0 (compatibility 2.0.0) <7FE61FCF-0E89-0744-F24C-2D1F6C1EAE89> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/Bom.framework/Bom 0x37b7000 - 0x37c4fe7 +libbz2.1.0.dylib 1.0.5 (compatibility 1.0.0) <BD82EE16-8FB3-A7F5-4CC0-EDE15AC18507> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libbz2.1.0.dylib 0x37c9000 - 0x37d4ff7 +AggregateDictionary ??? (???) <37904D52-6186-14BB-560B-D8B21316BB52> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/AggregateDictionary.framework/AggregateDictionary 0x37df000 - 0x3853ff7 +CoreAudio ??? (???) <0669925D-3993-07DC-9E76-369C1709553E> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CoreAudio.framework/CoreAudio 0x3888000 - 0x3cf8ff3 +libBLAS.dylib ??? (???) <3EE46AD9-7807-F326-E0AF-BAEF5939654B> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib 0x3d1e000 - 0x4160fe7 +libLAPACK.dylib ??? (???) <F66279A8-EE9C-5723-C3A0-E507ED462F8F> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libLAPACK.dylib 0x418c000 - 0x4198ff7 +CoreVideo 1.6.1 (compatibility 1.2.0) <966447F0-FB24-EC43-006E-CD32F1924481> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CoreVideo.framework/CoreVideo 0x41a5000 - 0x41b6ff7 +OpenGLES ??? (???) <EC9C05E6-BC78-B1B0-2044-7189D39A06FE> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/OpenGLES.framework/OpenGLES 0x41bf000 - 0x41c4ff3 +libGFXShared.dylib ??? (???) <0694A0A1-F539-2856-C2BA-61D323D56DEF> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/OpenGLES.framework/libGFXShared.dylib 0x41ca000 - 0x4205ff7 +libGLImage.dylib ??? (???) <9318562A-FDB5-0722-FC9C-BA0057BD3F53> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/OpenGLES.framework/libGLImage.dylib 0x420e000 - 0x4319ff7 +libGLProgrammability.dylib ??? (???) <F7AC6198-8A35-5DC9-2BDD-AD03BEC21EF5> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/OpenGLES.framework/libGLProgrammability.dylib 0x4339000 - 0x4340fff +libCoreVMClient.dylib ??? (???) <785DDEAB-CB21-E1A6-35C2-A7A3E02E48B2> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/OpenGLES.framework/libCoreVMClient.dylib 0x4348000 - 0x4b2ef4f +libLLVMContainer.dylib ??? (???) <067A9A4D-1B73-B338-BD26-54D28AFCC04F> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/OpenGLES.framework/libLLVMContainer.dylib 0x4c85000 - 0x4c8aff3 +AssetsLibraryServices ??? (???) <5BC721E0-FB4E-B81B-4FED-DF7189AD8BA0> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/AssetsLibraryServices.framework/AssetsLibraryServices 0x4c90000 - 0x4c90ff7 +libresolv.dylib 41.0.0 (compatibility 1.0.0) <78A807DB-B13E-9550-9C2E-8DA1DCBFEE8A> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libresolv.dylib 0x4f52000 - 0x4f9ffe7 +libCGFreetype.A.dylib 600.0.0 (compatibility 64.0.0) <2DFF120B-1542-ED85-07DC-EE7394592B76> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CoreGraphics.framework/Resources/libCGFreetype.A.dylib 0x4fb7000 - 0x4fe0fe7 +libRIP.A.dylib 600.0.0 (compatibility 64.0.0) <0E986874-F95E-1CA2-C221-E99DBD2E6AB1> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CoreGraphics.framework/Resources/libRIP.A.dylib 0xbeb0000 - 0xbeb9fff +WebUI ??? (???) <33AE9B5E-6083-2103-174B-2E6EC60A58A6> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/WebUI.framework/WebUI 0xbec3000 - 0xbec7ff3 +CertUI ??? (???) <5C86FEAC-C796-A9EA-076F-5A34B74B755E> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/CertUI.framework/CertUI 0xbece000 - 0xbed4ff3 +libMobileGestalt.dylib ??? (???) <1A9029E7-6BCA-46F5-0FAE-FB96EED30A05> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/usr/lib/libMobileGestalt.dylib 0xbedc000 - 0xbeefffb +PersistentConnection ??? (???) <E7C7258E-A316-B701-08C2-2A58A90211AB> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/PersistentConnection.framework/PersistentConnection 0xc210000 - 0xc26bff7 +ManagedConfiguration ??? (???) <85935272-F391-D5FF-9976-EFC8560AC1CB> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/ManagedConfiguration.framework/ManagedConfiguration 0xc2a9000 - 0xc2b7ff3 +AccountSettings ??? (???) <E77F2419-8ADC-3CC5-23A9-74F2CECA68B3> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/AccountSettings.framework/AccountSettings 0xc2c1000 - 0xc2c5fff +ApplePushService ??? (???) <218FD678-275F-0EDC-C9FF-D03062736212> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/ApplePushService.framework/ApplePushService 0xc2cb000 - 0xc2dcffb +DataDetectorsUI 52.0.0 (compatibility 1.0.0) <A2C9C080-84D0-5B51-40BE-4B6A7C512D91> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/DataDetectorsUI.framework/DataDetectorsUI 0xc2e9000 - 0xc2fdfe7 +DataDetectorsCore 154.0.0 (compatibility 1.0.0) <113CA3D9-474B-1223-ACA7-EB4D473C1583> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/PrivateFrameworks/DataDetectorsCore.framework/DataDetectorsCore 0xcdbd000 - 0xce00ff3 +QuickLook ??? (???) <94F8984E-BCEA-ADED-7749-C29CE5E04C68> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/QuickLook.framework/QuickLook 0xce29000 - 0xcf75fff +RawCamera 1.0.1 (compatibility 1.0.0) <33F076B3-56FC-6978-3FD7-DF5B1A416D02> /Developer-3/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/CoreServices/RawCamera.bundle/RawCamera 0x8fe00000 - 0x8fe4163b dyld 132.1 (???) <4CDE4F04-0DD6-224E-ACE5-3C06E169A801> /usr/lib/dyld 0x91590000 - 0x91593fe7 libmathCommon.A.dylib 315.0.0 (compatibility 1.0.0) <1622A54F-1A98-2CBE-B6A4-2122981A500E> /usr/lib/system/libmathCommon.A.dylib 0x91681000 - 0x91681ff7 com.apple.Accelerate 1.6 (Accelerate 1.6) <3891A689-4F38-FACD-38B2-4BF937DE30CF> /System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate 0x92ff7000 - 0x930ebff7 libiconv.2.dylib 7.0.0 (compatibility 7.0.0) <061ABF36-8BA9-79C1-6CE7-EC69A4998F51> /usr/lib/libiconv.2.dylib 0x9352d000 - 0x93541fe7 libbsm.0.dylib ??? (???) <821E415B-6C42-D359-78FF-E892792F8C52> /usr/lib/libbsm.0.dylib 0x9554f000 - 0x9562ffe7 com.apple.vImage 4.1 (4.1) <D029C515-08E1-93A6-3705-DD062A3A672C> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.framework/Versions/A/vImage 0x95630000 - 0x9569afe7 libstdc++.6.dylib 7.9.0 (compatibility 7.0.0) <411D87F4-B7E1-44EB-F201-F8B4F9227213> /usr/lib/libstdc++.6.dylib 0x97f72000 - 0x97f7eff7 libkxld.dylib ??? (???) <9A441C48-2D18-E716-5F38-CBEAE6A0BB3E> /usr/lib/system/libkxld.dylib 0x97f7f000 - 0x97f7fff7 com.apple.vecLib 3.6 (vecLib 3.6) <FF4DC8B6-0AB0-DEE8-ADA8-7B57645A1F36> /System/Library/Frameworks/vecLib.framework/Versions/A/vecLib 0x9869b000 - 0x986bbfe7 libresolv.9.dylib 41.0.0 (compatibility 1.0.0) <BF7FF2F6-5FD3-D78F-77BC-9E2CB2A5E309> /usr/lib/libresolv.9.dylib 0x98704000 - 0x98746ff7 libvDSP.dylib 268.0.1 (compatibility 1.0.0) <8A4721DE-25C4-C8AA-EA90-9DA7812E3EBA> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvDSP.dylib 0x98747000 - 0x987b6ff7 libvMisc.dylib 268.0.1 (compatibility 1.0.0) <595A5539-9F54-63E6-7AAC-C04E1574B050> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvMisc.dylib 0x989e9000 - 0x98b90ff7 libSystem.B.dylib 125.2.11 (compatibility 1.0.0) <2DCD13E3-1BD1-6F25-119A-3863A3848B90> /usr/lib/libSystem.B.dylib 0x9a4e5000 - 0x9a542ff7 com.apple.framework.IOKit 2.0 (???) <3DABAB9C-4949-F441-B077-0498F8E47A35> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit 0xffff0000 - 0xffff1fff libSystem.B.dylib ??? (???) <2DCD13E3-1BD1-6F25-119A-3863A3848B90> /usr/lib/libSystem.B.dylib EDIT: After turning on NSZombieEnabled looks like my NSMutableArray is being deallocated? .h @interface TalentRVC : UIViewController <locationGlobalMenuDelegate, industryGlobalMenuDelegate>{ NSMutableArray *locationsArray; } @property (nonatomic, retain) NSMutableArray *locationsArray; @end .m -(void)buildArrays { locationsArray = [NSMutableArray arrayWithCapacity: 8]; for (int i = 0; i!=8; i++){ NSMutableArray *array = [NSMutableArray arrayWithCapacity: 8]; [locationsArray addObject: array]; } //Africa [[locationsArray objectAtIndex:0] addObject: [NSNumber numberWithInt: 83]]; ... //Middle East [[locationsArray objectAtIndex:1] addObject: [NSNumber numberWithInt: 89]]; ... NSLog(@"Built locationsArray"); } So after running the first time locationsArray is dumped from memory? If so, how do I can it?

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• Animating the offset of the scrollView in a UICollectionView/UITableView causes prematurely disappearing cells

  - by radutzan

  We have a UICollectionView with a custom layout very similar to UITableView (it scrolls vertically). The UICollectionView displays only 3 cells simultaneously, with one of them being the currently active cell: [ 1 ] [*2*] [ 3 ] (The active cell here is #2.) The cells are roughly 280 points high, so only the active cell is fully visible on the screen. The user doesn't directly scroll the view to navigate, instead, she swipes the active cell horizontally to advance to the next cell. We then do some fancy animations and scroll the UICollectionView so the next cell is in the "active" position, thus making it the active one, moving the old one away and bringing up the next cell in the queue: [ 2 ] [*3*] [ 4 ] The problem here is setting the UICollectionView's offset. We currently set it in a UIView animation block (self.collectionView.contentOffset = targetOffset;) along with three other animating properties, which mostly works great, but causes the first cell (the previously active one, in the latter case, #2) to vanish as soon as the animation starts running, even before the delay interval completes. This is definitely not ideal. I've thought of some solutions, but can't figure out the best one: Absurdly enlarge the UICollectionView's frame to fit five cells instead of three, thus forcing it to keep the cells in memory even if they are offscreen. I've tried this and it works, but it sounds like an awfully dirty hack. Take a snapshot of the rendered content of the vanishing cell, put it in a UIImageView, add the UIImageView as a subview of the scrollView just before the cell goes away in the exact same position of the old cell, removing it once the animation ends. Sounds less sucky than the previous option (memory-wise, at least), but still kinda hacky. I also don't know the best way to accomplish this, please point me in the right direction. Switch to UIScrollView's setContentOffset:animated:. We actually used to have this, and it fixed the disappearing cell issue, but running this in parallel with the other UIView animations apparently competes for the attention of the main thread, thus creating a terribly choppy animation on single-core devices (iPhone 3GS/4). It also doesn't allow us to change the duration or easing of the animation, so it feels out of sync with the rest. Still an option if we can find a way to make it work in harmony with the UIView block animations. Switch to UICollectionView's scrollToItemAtIndexPath:atScrollPosition:animated:. Haven't tried this, but it has a big downside: it only takes 3 possible constants (that apply to this case, at least) for the target scroll position: UICollectionViewScrollPositionTop, UICollectionViewScrollPositionCenteredVertically and UICollectionViewScrollPositionBottom. The active cell could vary its height, but it always has to be 35 points from the top of the window, and these options don't provide enough control to accomplish the design. It could also potentially be just as problematic as 3.1. Still an option because there might be a way to go around the scroll position thing that I don't know of, and it might not have the same issue with the main thread, which seems unlikely. Any help will be greatly appreciated. Please ask if you need clarification. Thanks a lot!

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• MPNowPlayingInfoCenter defaultCenter will not update or retrieve information

  - by Jayson Lane

  I'm working to update the MPNowPlayingInfoCenter and having a bit of trouble. I've tried quite a bit to the point where I'm at a loss. The following is my code: self.audioPlayer.allowsAirPlay = NO; Class playingInfoCenter = NSClassFromString(@"MPNowPlayingInfoCenter"); if (playingInfoCenter) { NSMutableDictionary *songInfo = [[NSMutableDictionary alloc] init]; MPMediaItemArtwork *albumArt = [[MPMediaItemArtwork alloc] initWithImage:[UIImage imageNamed:@"series_placeholder"]]; [songInfo setObject:thePodcast.title forKey:MPMediaItemPropertyTitle]; [songInfo setObject:thePodcast.author forKey:MPMediaItemPropertyArtist]; [songInfo setObject:@"NCC" forKey:MPMediaItemPropertyAlbumTitle]; [songInfo setObject:albumArt forKey:MPMediaItemPropertyArtwork]; [[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:songInfo]; } This isn't working, I've also tried: [[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:nil]; In an attempt to get it to remove the existing information from the iPod app (or whatever may have info there). In addition, just to see if I could find out the problem, I've tried retrieving the current information on app launch: NSDictionary *info = [[MPNowPlayingInfoCenter defaultCenter] nowPlayingInfo]; NSString *title = [info valueForKey:MPMediaItemPropertyTitle]; NSString *author = [info valueForKey:MPMediaItemPropertyArtist]; NSLog(@"Currently playing: %@ // %@", title, author); and I get Currently playing: (null) // (null) I've researched this quite a bit and the following articles explain it pretty thoroughly, however, I am still unable to get this working properly. Am I missing something? Would there be anything interfering with this? Is this a service something my app needs to register to access (didn't see this in any docs)? Apple's Docs Change lock screen background audio controls Now playing info ignored UPDATE: I've created a tutorial outlining how I was able to get this functioning properly: http://jaysonlane.net/tech-blog/2012/04/lock-screen-now-playing-with-mpnowplayinginfocenter/

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• Terminating app due to uncaught exception 'NSGenericException', reason: '*** Collection <CALayerArray: 0x66522e0> was mutated while being enumerated

  - by fahu

  some times my app crashed by showing * Collection was mutated while being enumerated . This is occurring in same line of code all the time.please help me on this issue. i stuck on this. the app is crashing at pushing view controller line of my code.but it is not frequent one. my error console Terminating app due to uncaught exception 'NSGenericException', reason: '* Collection CALayerArray: 0x1030c730 was mutated while being enumerated. "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "" )' my code: - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { ServiceDetails *service=[[ServiceDetails alloc] initWithNibName:@"ServiceDetails" bundle:nil]; CompanyListingForm *list=[[CompanyListingForm alloc]initWithNibName:@"CompanyListingForm" bundle:nil]; [category_company_text resignFirstResponder]; if(viewHoldingTable) { [viewHoldingTable removeFromSuperview]; } if (category_clicked_flag==0) { if (location_or_cat_com==0) { NSMutableArray *get=[district_array objectAtIndex:indexPath.row]; locationid=[[get objectAtIndex:0]intValue]; [location_textfield resignFirstResponder]; location_textfield.text=[get objectAtIndex:1]; } else { if (draggingView) { [draggingView removeFromSuperview]; } if (viewHoldingTable) { [viewHoldingTable removeFromSuperview]; } NSMutableArray *get=[company_array objectAtIndex:indexPath.row]; category_company_text.text=[get objectAtIndex:1]; service.ida=[NSString stringWithFormat:@"%d",[[get objectAtIndex:0] intValue]]; service.idloc=[NSString stringWithFormat:@"%d",locationid]; [self.navigationController pushViewController:service animated:YES];//getting error at this point. //[emer release]; } } else { if (location_or_cat_com==0) { NSMutableArray *get=[district_array objectAtIndex:indexPath.row]; locationid=[[get objectAtIndex:0]intValue]; [location_textfield resignFirstResponder]; location_textfield.text=[get objectAtIndex:1]; } else { NSMutableArray *get=[category_array objectAtIndex:indexPath.row]; category_company_text.text=[get objectAtIndex:1]; int catid=[[get objectAtIndex:0]intValue]; list.IDForLoc=[NSString stringWithFormat:@"%d",locationid]; list.IDForCat=[NSString stringWithFormat:@"%d",catid]; list.companydetails=[get objectAtIndex:1]; [self.navigationController pushViewController:list animated:YES];//getting error at this point. } } [service release]; [list release]; }

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• Pinch gesture in QLPreviewController?

  - by Arne

  I am using the QLPreviewController in my project, but cannot use pinch gestures to zoom in. What do I need to set up first? This is how I create the view controller: - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { QLPreviewController *previewer = [[QLPreviewController alloc] init]; [previewer setDataSource:self]; [previewer setCurrentPreviewItemIndex:indexPath.row]; [[self navigationController] pushViewController:previewer animated:YES]; }

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• NSURLSession and amazon S3 uploads

  - by George Green

  I have an app which is currently uploading images to amazon S3. I have been trying to switch it from using NSURLConnection to NSURLSession so that the uploads can continue while the app is in the background! I seem to be hitting a bit of an issue. The NSURLRequest is created and passed to the NSURLSession but amazon sends back a 403 - forbidden response, if I pass the same request to a NSURLConnection it uploads the file perfectly. Here is the code that creates the response: NSString *requestURLString = [NSString stringWithFormat:@"http://%@.%@/%@/%@", BUCKET_NAME, AWS_HOST, DIRECTORY_NAME, filename]; NSURL *requestURL = [NSURL URLWithString:requestURLString]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:requestURL cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:60.0]; // Configure request [request setHTTPMethod:@"PUT"]; [request setValue:[NSString stringWithFormat:@"%@.%@", BUCKET_NAME, AWS_HOST] forHTTPHeaderField:@"Host"]; [request setValue:[self formattedDateString] forHTTPHeaderField:@"Date"]; [request setValue:@"public-read" forHTTPHeaderField:@"x-amz-acl"]; [request setHTTPBody:imageData]; And then this signs the response (I think this came from another SO answer): NSString *contentMd5 = [request valueForHTTPHeaderField:@"Content-MD5"]; NSString *contentType = [request valueForHTTPHeaderField:@"Content-Type"]; NSString *timestamp = [request valueForHTTPHeaderField:@"Date"]; if (nil == contentMd5) contentMd5 = @""; if (nil == contentType) contentType = @""; NSMutableString *canonicalizedAmzHeaders = [NSMutableString string]; NSArray *sortedHeaders = [[[request allHTTPHeaderFields] allKeys] sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)]; for (id key in sortedHeaders) { NSString *keyName = [(NSString *)key lowercaseString]; if ([keyName hasPrefix:@"x-amz-"]){ [canonicalizedAmzHeaders appendFormat:@"%@:%@\n", keyName, [request valueForHTTPHeaderField:(NSString *)key]]; } } NSString *bucket = @""; NSString *path = request.URL.path; NSString *query = request.URL.query; NSString *host = [request valueForHTTPHeaderField:@"Host"]; if (![host isEqualToString:@"s3.amazonaws.com"]) { bucket = [host substringToIndex:[host rangeOfString:@".s3.amazonaws.com"].location]; } NSString* canonicalizedResource; if (nil == path || path.length < 1) { if ( nil == bucket || bucket.length < 1 ) { canonicalizedResource = @"/"; } else { canonicalizedResource = [NSString stringWithFormat:@"/%@/", bucket]; } } else { canonicalizedResource = [NSString stringWithFormat:@"/%@%@", bucket, path]; } if (query != nil && [query length] > 0) { canonicalizedResource = [canonicalizedResource stringByAppendingFormat:@"?%@", query]; } NSString* stringToSign = [NSString stringWithFormat:@"%@\n%@\n%@\n%@\n%@%@", [request HTTPMethod], contentMd5, contentType, timestamp, canonicalizedAmzHeaders, canonicalizedResource]; NSString *signature = [self signatureForString:stringToSign]; [request setValue:[NSString stringWithFormat:@"AWS %@:%@", self.S3AccessKey, signature] forHTTPHeaderField:@"Authorization"]; Then if I use this line of code: [NSURLConnection connectionWithRequest:request delegate:self]; It works and uploads the file, but if I use: NSURLSessionUploadTask *task = [self.session uploadTaskWithRequest:request fromFile:[NSURL fileURLWithPath:filePath]]; [task resume]; I get the forbidden error..!? Has anyone tried uploading to S3 with this and hit similar issues? I wonder if it is to do with the way the session pauses and resumes uploads, or it is doing something funny to the request..? One possible solution would be to upload the file to an interim server that I control and have that forward it to S3 when it is complete... but this is clearly not an ideal solution! Any help is much appreciated!! Thanks!

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• Ho can I tell when the background is touched on a UICollectionView?

  - by Mason Cloud

  I've tried subclassing UICollectionView and overriding touchesBegan:withEvent: and hitTest:WithEvent:, and both of those methods trigger when I touch a cell. However, if I touch the space between the cells, nothing happens at all. Here's what I've created: @interface WSImageGalleryCollectionView : UICollectionView @end ..and.. @implementation WSImageGalleryCollectionView - (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"Touches began"); [super touchesBegan:touches withEvent:event]; } - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event { NSLog(@"Hit test reached"); return [super hitTest:point withEvent:event]; } @end

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• IOs7 app crashing when in background

  - by Leonardo

  My app sometimes crashes when in background and shows the following crash log: Nov 7 12:33:31 iPad backboardd[29] <Warning>: MyApp[3096] has active assertions beyond permitted time: {( <BKProcessAssertion: 0x14680c60> identifier: Called by MyApp, from -[AppDelegate applicationDidEnterBackground:] process: MyApp[3096] permittedBackgroundDuration: 180.000000 reason: finishTask owner pid:3096 preventSuspend preventIdleSleep preventSuspendOnSleep )} Looking through other questions I found out that the crash message indicates that I didn't end a task properly, so when its time expired the OS ended it and crashed my app. So I added some NSLogs: - (void)applicationDidEnterBackground:(UIApplication *)application { [self saveContext]; [Settings setCallLock:YES]; [self saveStuff]; if ([self isBackgroundTaskNeeded]) { UIApplication* app = [UIApplication sharedApplication]; bgTask = [app beginBackgroundTaskWithExpirationHandler:^{ [self pauseDownloads]; NSLog(@"Debug - Ending background task %d",bgTask); [app endBackgroundTask:bgTask]; NSLog(@"Debug - Background task %d ended",bgTask); bgTask = UIBackgroundTaskInvalid; }]; NSLog(@"Debug - Starting background task %d",bgTask); [self initBackground]; } } and found out that the task was called twice when it crashed: Nov 7 12:30:02 iPad MyApp[3096] <Warning>: Debug - Starting background task 7 Nov 7 12:30:30 iPad MyApp[3096] <Warning>: Debug - Starting background task 8 Nov 7 12:33:26 iPad MyApp[3096] <Warning>: Debug - Ending background task 8 Nov 7 12:33:26 iPad MyApp[3096] <Warning>: Debug - Background task 8 ended Nov 7 12:33:26 iPad MyApp[3096] <Warning>: Debug - Ending background task 0 Nov 7 12:33:26 iPad MyApp[3096] <Warning>: Debug - Background task 0 ended I wasn't able to tell when the double call happens and why. So question is why is the task being called twice and is there a way to avoid it? Edit: - (void) pauseDownloads { for (AFDownloadRequestOperation *operation in self.operationQueue.operations) { if(![operation isPaused]) { [operation pause]; } } }

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• OBJC_CLASS_$_MTSCRA", referenced from

  - by user1078841

  I was trying to make a sample code run download by the link http://www.magtek.com/support/software/downloads/sw/99510108.zip This is a card reader api ,here is a sample code.When I run this code I got the error: ld: warning: ignoring file /Users/gaurav.garg/Downloads/99510108/SampleCode/Lib/libMTSCRA.a, missing required architecture i386 in file Undefined symbols for architecture i386: "_OBJC_CLASS_$_MTSCRA", referenced from: objc-class-ref in MagTekDemoAppDelegate.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation) The class MTSCRA is only a header file,And the solution that I have cheked That we have to add the .m file in compiled source path of build build phase of target...but unfortunately I don't have the MTSCRA.m file.MTscra.h have the AudioToolBox and externalAccesory framework.

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• Problems with transitionWithView and animateWithDuration

  - by MusicMathTech

  I have problems with transitionWithView and animateWithDuration. One of my animateWithDuration blocks doesn't transition, it is a sudden change, and transitionWithView does not temporarily disable user interaction. I have checked the docs and believe I am doing everything correctly, but obviously something is wrong. Here are the two blocks of code: This is in my main View Controller ViewController which has three container views/child view controllers. This block moves one of the container views, but does not block the user from other interactions in ViewController while the transition is occurring. [UIView transitionWithView:self.view duration:0.5 options:UIViewAnimationOptionCurveEaseOut animations:^ { CGRect frame = _containerView.frame; frame.origin.y = self.view.frame.size.height - _containerView.frame.size.height; _containerView.frame = frame; }completion:^(BOOL finished) { // do something }]; This is in one of my container view controllers. The animation seems to have no effect as the text of the productTitleLabel and productDescriptionTextView changes suddenly as if the animation block does not exist. - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [self.viewController toggleFlavoredOliveOilsTableView]; if (indexPath.row > 0) { NSDictionary *selectedCellDict = [[_flavoredOliveOilsDict objectForKey:@"Unflavored Olive Oils"] objectAtIndex:indexPath.row - 1]; [UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionTransitionCrossDissolve animations:^ { self.viewController.productTitleLabel.text = [_flavoredOliveOilsTableView cellForRowAtIndexPath:indexPath].textLabel.text; self.viewController.productDescriptionTextView.text = [selectedCellDict objectForKey:@"Description"]; }completion:nil]; if (indexPath.row == 1) { [self.viewController setProductDescriptionTextViewFrameForInformationTab]; } else { [self.viewController setProductDescriptionTextViewFrameForNonInformationTab]; //self.viewController.productImageView.image = [UIImage imageNamed:[selectedCellDict objectForKey:@"Image"]]; } } } I think the problems are somewhat related as most of my animation and transition blocks don't work completely as expected. Thanks for any help. Edit What I am trying to accomplish is moving a container view in ViewController and set the text and image properties of a label, text view, and image view; all of which are in the main view. The details of these properties are sent via the child view controller. The transitionWithView is in a method called toggleFlavoredOiveOilsTableView which is called in didSelectRowAtIndexPath. I think the problem is that I am trying to call two different animation/transition blocks at the same time.

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• Speed up UIPageViewController

  - by Jack Humphries

  I have a UIPageViewController with several pages. Each page is the same view controller, but the page number is kept track of and the correct page of a PDF is shown. The problem is that each PDF page needs to be loaded and drawn before the curl effect works (you slide your finger across the screen and nothing happens until loaded). Any ideas on how to speed this up or preload the next page? Thanks for your help.

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• Add UIProgressView to a custom UITableViewCell and detect what is the index row

  - by Piero

  i create a custom UITableViewCell and i add on the Cell a UIProgressView, because when i add a row on the UITableView i download the information from a XML data, and i want use the ProgressView to show the progress of the process, my question is, how i can detect in what index row i have to change the progress bar, and then hidden it?...what is the index path of the row just created? in the: cellForRowAtIndexPath:(NSIndexPath *)indexPath i retrieve information from my Custom UITableViewCell in this way: UILabel *label; label = (UILabel *)[cell viewWithTag:1000]; label.text = [[managedObject valueForKey:@"firstName"] description]; so how i can know the index path row of the row just added, to change then the progress bar?

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• How to preserve the aspect ratio of video using AVAssetWriter

  - by Satoshi Nakajima

  I have a following code, which captures the video from the camera and stores it as a QuickMovie file using AVAssetWriter. It works fine, but the aspect ratio is not perfect because the width and height are hardcoded (480 x 320) in the outputSettings for AVAssetWriterInput. I'd rather find out the aspect ratio of the source video, and specify the appropriate height (480 x aspect ratio). Does anybody know how to do it? Should I defer the creation of AssetWriterInput until the first sampleBuffer? // set the sessionPreset to 'medium' self.captureSession = [[AVCaptureSession alloc] init]; self.captureSession.sessionPreset = AVCaptureSessionPresetMedium; ... // create AVCaptureVideoDataOutput self.captureVideo = [[AVCaptureVideoDataOutput alloc] init]; NSString* formatTypeKey = (NSString*)kCVPixelBufferPixelFormatTypeKey; self.captureVideo.videoSettings = @{ formatTypeKey:[NSNumber numberWithInt:kCVPixelFormatType_32BGRA] }; [self.captureVideo setSampleBufferDelegate:self queue:dispatch_get_main_queue()]; // create an AVAssetWriter NSError* error = nil; self.videoWriter = [[AVAssetWriter alloc] initWithURL:url fileType:AVFileTypeQuickTimeMovie error:&error]; ... // create AVAssetWriterInput with specified settings NSDictionary* compression = @{ AVVideoAverageBitRateKey:[NSNumber numberWithInt:960000], AVVideoMaxKeyFrameIntervalKey:[NSNumber numberWithInt:1] }; self.videoInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:@{ AVVideoCodecKey:AVVideoCodecH264, AVVideoCompressionPropertiesKey:compression, AVVideoWidthKey:[NSNumber numberWithInt:480], // required AVVideoHeightKey:[NSNumber numberWithInt:320] // required }]; // add it to the AVAssetWriter [self.videoWriter addInput:self.videoInput];

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• Marrying Core Animation with OpenGL ES

  - by Ole Begemann

  Edit: I suppose instead of the long explanation below I might also ask: Sending -setNeedsDisplay to an instance of CAEAGLLayer does not cause the layer to redraw (i.e., -drawInContext: is not called). Instead, I get this console message: <GLLayer: 0x4d500b0>: calling -display has no effect. Is there a way around this issue? Can I invoke -drawInContext: when -setNeedsDisplay is called? Long explanation below: I have an OpenGL scene that I would like to animate using Core Animation animations. Following the standard approach to animate custom properties in a CALayer, I created a subclass of CAEAGLLayer and defined a property sceneCenterPoint in it whose value should be animated. My layer also holds a reference to the OpenGL renderer: #import <UIKit/UIKit.h> #import <QuartzCore/QuartzCore.h> #import "ES2Renderer.h" @interface GLLayer : CAEAGLLayer { ES2Renderer *renderer; } @property (nonatomic, retain) ES2Renderer *renderer; @property (nonatomic, assign) CGPoint sceneCenterPoint; I then declare the property @dynamic to let CA create the accessors, override +needsDisplayForKey: and implement -drawInContext: to pass the current value of the sceneCenterPoint property to the renderer and ask it to render the scene: #import "GLLayer.h" @implementation GLLayer @synthesize renderer; @dynamic sceneCenterPoint; + (BOOL) needsDisplayForKey:(NSString *)key { if ([key isEqualToString:@"sceneCenterPoint"]) { return YES; } else { return [super needsDisplayForKey:key]; } } - (void) drawInContext:(CGContextRef)ctx { self.renderer.centerPoint = self.sceneCenterPoint; [self.renderer render]; } ... (If you have access to the WWDC 2009 session videos, you can review this technique in session 303 ("Animated Drawing")). Now, when I create an explicit animation for the layer on the keyPath @"sceneCenterPoint", Core Animation should calculate the interpolated values for the custom properties and call -drawInContext: for each step of the animation: - (IBAction)animateButtonTapped:(id)sender { CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"sceneCenterPoint"]; animation.duration = 1.0; animation.fromValue = [NSValue valueWithCGPoint:CGPointZero]; animation.toValue = [NSValue valueWithCGPoint:CGPointMake(1.0f, 1.0f)]; [self.glView.layer addAnimation:animation forKey:nil]; } At least that is what would happen for a normal CALayer subclass. When I subclass CAEAGLLayer, I get this output on the console for each step of the animation: 2010-12-21 13:59:22.180 CoreAnimationOpenGL[7496:207] <GLLayer: 0x4e0be20>: calling -display has no effect. 2010-12-21 13:59:22.198 CoreAnimationOpenGL[7496:207] <GLLayer: 0x4e0be20>: calling -display has no effect. 2010-12-21 13:59:22.216 CoreAnimationOpenGL[7496:207] <GLLayer: 0x4e0be20>: calling -display has no effect. 2010-12-21 13:59:22.233 CoreAnimationOpenGL[7496:207] <GLLayer: 0x4e0be20>: calling -display has no effect. ... So it seems that, possibly for performance reasons, for OpenGL layers, -drawInContext: is not getting called because these layers do not use the standard -display method to draw themselves. Can anybody confirm that? Is there a way around it? Or can I not use the technique I laid out above? This would mean I would have to implement the animations manually in the OpenGL renderer (which is possible but not as elegant IMO).

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• why eventsMatchingPredicate returns nil?

  - by OneZero

  Here's my code: NSString * calID = [[NSUserDefaults standardUserDefaults] objectForKey:@"calendarIdentifier"]; EKCalendar *cal = [eventStore calendarWithIdentifier:calID]; // If calendar exists if(cal) { // Retrieve all existing events until today NSPredicate *predicate = [eventStore predicateForEventsWithStartDate:[NSDate distantPast] endDate:[NSDate date] calendars:@[cal]]; self.events = [eventStore eventsMatchingPredicate:predicate]; if(self.events==nil) NSLog(@"nil events!"); } The calendarItentifier is the variable that I stored when I created the calendar in my program, so it's not the case I'm adding events on the wrong calendar. However, the code does not work to retrieve past events on the calendar, it simply returns nil to self.events. But I DID add events on the calendar. Can anything tell me if there's anything wrong with the code?

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• Expand and Shrink UIScrollView with animation

  - by Dilip Rajkumar

  I am having a UITableView inside a scrollview. So I am trying to do a accordion like component using UITableView. So I need to expand the UITableView to add more cell. In that case I have to increase the height of UIScrollView with a animation so that it matches the table animation. - (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath { NSInteger row = [indexPath row]; BOOL preventReopen = NO; if (row == expandedRowIndex + 1 && expandedRowIndex != -1) return nil; [tableView beginUpdates]; if (expandedRowIndex != -1) { familyTableView.frame = CGRectMake(familyTableView.frame.origin.x, familyTableView.frame.origin.y, familyTableView.frame.size.width, 3*50+22); toolsTableView.frame = CGRectMake(toolsTableView.frame.origin.x, familyTableView.frame.origin.y + familyTableView.frame.size.height + 20, toolsTableView.frame.size.width, 4*50+22); myAccountTableView.frame = CGRectMake(myAccountTableView.frame.origin.x, toolsTableView.frame.origin.y + toolsTableView.frame.size.height + 20, myAccountTableView.frame.size.width, 2*50+22); settingsScrollView.contentSize = CGSizeMake(320, familyTableView.frame.size.height + toolsTableView.frame.size.height+ myAccountTableView.frame.size.height + 380); settingsScrollView.contentInset = UIEdgeInsetsMake(0, 0, familyTableView.frame.size.height + toolsTableView.frame.size.height+ myAccountTableView.frame.size.height + 380, 0); NSInteger rowToRemove = expandedRowIndex + 1; preventReopen = row == expandedRowIndex; if (row > expandedRowIndex) row--; expandedRowIndex = -1; [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:[NSIndexPath indexPathForRow:rowToRemove inSection:0]] withRowAnimation:UITableViewRowAnimationTop]; }else { familyTableView.frame = CGRectMake(familyTableView.frame.origin.x, familyTableView.frame.origin.y, familyTableView.frame.size.width, (3*50+22) + 100); toolsTableView.frame = CGRectMake(toolsTableView.frame.origin.x, familyTableView.frame.origin.y + familyTableView.frame.size.height + 20, toolsTableView.frame.size.width, 4*50+22); myAccountTableView.frame = CGRectMake(myAccountTableView.frame.origin.x, toolsTableView.frame.origin.y + toolsTableView.frame.size.height + 20, myAccountTableView.frame.size.width, 2*50+22); settingsScrollView.contentSize = CGSizeMake(320, familyTableView.frame.size.height + toolsTableView.frame.size.height+ myAccountTableView.frame.size.height + 380); settingsScrollView.contentInset = UIEdgeInsetsMake(0, 0, familyTableView.frame.size.height + toolsTableView.frame.size.height+ myAccountTableView.frame.size.height + 380, 0); } NSInteger rowToAdd = -1; if (!preventReopen) { rowToAdd = row + 1; expandedRowIndex = row; [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:[NSIndexPath indexPathForRow:rowToAdd inSection:0]] withRowAnimation:UITableViewRowAnimationTop]; } [tableView endUpdates]; return nil; } I am not good at animation. Any help is greatly appreciated. What I need is when we do [tableView beginUpdates] we have to start animating the resize effect to UIScrollView and it should end when [tableView endUpdates] executes. So the Accordion executes flawlessly. Thanks in advance for any help..

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• EXC_BAD_ACCESS error on a UITableView with ARC?

  - by Arnaud Drizard

  I am building a simple app with a custom bar tab which loads the content of the ViewController from a UITableView located in another ViewController. However, every time I try to scroll on the tableview, I get an exc_bad_access error. I enabled NSzombies and guard malloc to get more info on the issue. In the console I get: "message sent to deallocated instance 0x19182f20" and after profiling I get: # Address Category Event Type RefCt Timestamp Size Responsible Library Responsible Caller 56 0x19182f20 FirstTabBarViewController Zombie -1 00:16.613.309 0 UIKit -[UIScrollView(UIScrollViewInternal) _scrollViewWillBeginDragging] Here is a bit of the code of the ViewController in which the error occurs: .h file: #import <UIKit/UIKit.h> #import "DataController.h" @interface FirstTabBarViewController : UIViewController <UITableViewDelegate, UITableViewDataSource> { IBOutlet UITableView* tabBarTable; } @property (strong, nonatomic) IBOutlet UIView *mainView; @property (strong, nonatomic) IBOutlet UITableView *tabBarTable; @property (nonatomic, strong) DataController *messageDataController; @end .m file: #import "FirstTabBarViewController.h" #import "DataController.h" @interface FirstTabBarViewController () @end @implementation FirstTabBarViewController @synthesize tabBarTable=_tabBarTable; - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (void)awakeFromNib { [super awakeFromNib]; self.messageDataController=[[DataController alloc] init]; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } - (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ return [self.messageDataController countOfList]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"mainCell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil){ cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; }; NSString *expenseAtIndex = [self.messageDataController objectInListAtIndex:indexPath.row]; [[cell textLabel] setText:expenseAtIndex]; return cell; } - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the specified item to be editable. return NO; } @end This FirstTabBarViewController is loaded in the MainViewController with the following custom segue: #import "customTabBarSegue.h" #import "MainViewController.h" @implementation customTabBarSegue -(void) perform { MainViewController *src= (MainViewController *) [self sourceViewController]; UIViewController *dst=(UIViewController *)[self destinationViewController]; for (UIView *view in src.placeholderView.subviews){ [view removeFromSuperview]; } src.currentViewController =dst; [src.placeholderView addSubview:dst.view]; } @end The Datacontroller class is just a simple NSMutableArray containing strings. I am using ARC so I don't understand where the memory management error comes from. Does anybody have a clue? Any help much appreciated ;) Thanks!!

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• annotationView didChangeDragState being fired multiple times

  - by RodH257

  I've got a draggable annotation in IOS4 mapkit, and I'm trying to call an event when the annotation is dragged to a new position. my code currently looks like: - (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)annotationView didChangeDragState:(MKAnnotationViewDragState)newState fromOldState:(MKAnnotationViewDragState)oldState { if (newState == MKAnnotationViewDragStateEnding) { CLLocationCoordinate2D droppedAt = annotationView.annotation.coordinate; NSLog(@"dropped at %f,%f", droppedAt.latitude, droppedAt.longitude); //update the annotation //see if its an information annotation if ([annotationView.annotation isKindOfClass:[InfoAnnotation class]]) { NSLog(@"Info annotation updating.."); InfoAnnotation* userAnnotation = ((InfoAnnotation *)annotationView.annotation); [userAnnotation updateLocationWithServerForConvoy: self.title]; } } } the code simply logs the update and then tells the annotation to send its update to my server, which is a custom method. This method seems to be getting fired multiple times, see the log here: 2011-06-15 01:12:39.347 Convoy[1699:207] dropped at 37.340206,-122.027550 2011-06-15 01:12:39.347 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:39.658 Convoy[1699:207] dropped at 37.340206,-122.027550 2011-06-15 01:12:39.659 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:39.957 Convoy[1699:207] dropped at 37.340206,-122.027550 2011-06-15 01:12:39.958 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:43.415 Convoy[1699:207] dropped at 37.339251,-122.026691 2011-06-15 01:12:43.416 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:43.713 Convoy[1699:207] dropped at 37.339251,-122.026691 2011-06-15 01:12:43.713 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:44.006 Convoy[1699:207] dropped at 37.339251,-122.026691 2011-06-15 01:12:44.006 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:44.297 Convoy[1699:207] dropped at 37.339251,-122.026691 2011-06-15 01:12:44.297 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:54.825 Convoy[1699:207] dropped at 37.337135,-122.025833 2011-06-15 01:12:54.825 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:55.150 Convoy[1699:207] dropped at 37.337135,-122.025833 2011-06-15 01:12:55.150 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:55.475 Convoy[1699:207] dropped at 37.337135,-122.025833 2011-06-15 01:12:55.476 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:55.771 Convoy[1699:207] dropped at 37.337135,-122.025833 2011-06-15 01:12:55.772 Convoy[1699:207] Info annotation updating.. 2011-06-15 01:12:56.070 Convoy[1699:207] dropped at 37.337135,-122.025833 2011-06-15 01:12:56.070 Convoy[1699:207] Info annotation updating.. Each time I drag it (ie in the gaps) it seems to add 1 to the amount of times it's called. Can anyone give me any idea what may be causing this?

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• AVFoundation: Video to OpenGL texture working - How to play and sync audio?

  - by j00hi

  I've managed to load a video-track of a movie frame by frame into a OpenGL texture with AVFoundation. I followed the steps described in the answer here: iOS4: how do I use video file as an OpenGL texture? and took some code from the GLVideoFrame sample from WWDC2010 which can be downloaded here: http://bit.ly/cEf0rM How do I play the audio-track of the movie synchronously to the video. I think it would not be a good idea to play it in a separate player, but to use the audio-track of the same AVAsset. AVAssetTrack* audioTrack = [[asset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]; I retrieve a videoframe and it's timestamp in the CADisplayLink-callback via CMSampleBufferRef sampleBuffer = [self.readerOutput copyNextSampleBuffer]; CMTime timestamp = CMSampleBufferGetPresentationTimeStamp( sampleBuffer ); where readerOutput is of type AVAssetReaderTrackOutput* How to get the corresponding audio-samples? And how to play them? Edit: I've looked around a bit and I think, best would be to use AudioQueue from the AudioToolbox.framework using the approach described here: AVAssetReader and Audio Queue streaming problem There is also an audio-player in the AVFoundation: AVAudioPlayer. But I don't know exactly how I should pass data to it's initWithData-initializer which expects NSData. Furthermore I don't think it's the best choice for my case because a new AVAudioPlayer-instance would have to be created for every new chunk of audio samples, as I understand it. Any other suggestions? What's the best way to play the raw audio samples which i get from the AVAssetReaderTrackOutput?

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• SOLVED mwfeedparser integrating in my app gives EXC_BAD_ACCESS (code=1, address=0xa0040008)

  - by Pranoy C

  SOLVED- Got it! The problem was that since I am creating the DoParsingStuff *parseThisUrl object in the viewDidLoad method, it's scope was only within that method. So after the method finished, the object got deallocated. I changed it to an instance variable instead and now it works. It gives a different error but that it an entirely different issue. Issue was: I have been struggling with trying to integrate the mwfeedparser library in my app for parsing RSS and ATOM feeds. It throws a gives EXC_BAD_ACCESS error which I can't seem to troubleshoot. //My Class looks like - My interface looks like: #import <Foundation/Foundation.h> #import "MWFeedParser.h" #import "NSString+HTML.h" @protocol ParseCompleted <NSObject> -(void)parsedArray:(NSMutableArray *)parsedArray; @end @interface DoParsingStuff : NSObject<MWFeedParserDelegate> @property (nonatomic,strong) NSMutableArray *parsedItems; @property (nonatomic, strong) NSArray *itemsToDisplay; @property (nonatomic,strong) MWFeedParser *feedParser; @property (nonatomic,strong) NSURL *feedurl; @property (nonatomic,strong) id <ParseCompleted> delegate; -(id)initWithFeedURL:(NSURL *)url; @end //And Implementaion: #import "DoParsingStuff.h" @implementation DoParsingStuff @synthesize parsedItems = _parsedItems; @synthesize itemsToDisplay = _itemsToDisplay; @synthesize feedParser = _feedParser; @synthesize feedurl=_feedurl; @synthesize delegate = _delegate; -(id)initWithFeedURL:(NSURL *)url{ if(self = [super init]){ _feedurl=url; _feedParser = [[MWFeedParser alloc] initWithFeedURL:_feedurl]; _feedParser.delegate=self; _feedParser.feedParseType=ParseTypeFull; _feedParser.connectionType=ConnectionTypeAsynchronously; } return self; } -(void)doParsing{ BOOL y = [_feedParser parse]; } # pragma mark - # pragma mark MWFeedParserDelegate - (void)feedParserDidStart:(MWFeedParser *)parser { //Just tells what url is being parsed e.g. http://www.wired.com/reviews/feeds/latestProductsRss NSLog(@"Started Parsing: %@", parser.url); } - (void)feedParser:(MWFeedParser *)parser didParseFeedInfo:(MWFeedInfo *)info { //What is the Feed about e.g. "Product Reviews" NSLog(@"Parsed Feed Info: “%@”", info.title); //self.title = info.title; } - (void)feedParser:(MWFeedParser *)parser didParseFeedItem:(MWFeedItem *)item { //Prints current element's title e.g. “An Arthropod for Your iDevices” NSLog(@"Parsed Feed Item: “%@”", item.title); if (item) [_parsedItems addObject:item]; } - (void)feedParserDidFinish:(MWFeedParser *)parser {//This is where you can do your own stuff with the parsed items NSLog(@"Finished Parsing%@", (parser.stopped ? @" (Stopped)" : @"")); [_delegate parsedArray:_parsedItems]; //[self updateTableWithParsedItems]; } - (void)feedParser:(MWFeedParser *)parser didFailWithError:(NSError *)error { NSLog(@"Finished Parsing With Error: %@", error); if (_parsedItems.count == 0) { //self.title = @"Failed"; // Show failed message in title } else { // Failed but some items parsed, so show and inform of error UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Parsing Incomplete" message:@"There was an error during the parsing of this feed. Not all of the feed items could parsed." delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil]; [alert show]; } //[self updateTableWithParsedItems]; } @end //I am calling this from my main viewcontroller as such: #import "DoParsingStuff.h" @interface ViewController : UIViewController <ParseCompleted> .... //And I have the following methods in my implementation: DoParsingStuff *parseThisUrl = [[DoParsingStuff alloc] initWithFeedURL:[NSURL URLWithString:@"http://www.theverge.com/rss/index.xml"]]; parseThisUrl.delegate=self; [parseThisUrl doParsing]; I have the method defined here as- -(void)parsedArray:(NSMutableArray *)parsedArray{ NSLog(@"%@",parsedArray); } //I stepped through breakpoints- When I try to go through the breakpoints, I see that everything goes fine till the very last [parseThisUrl doParsing]; in my delegate class. After that it starts showing me memory registers where I get lost. I think it could be due to arc as I have disabled arc on the mwfeedparser files but am using arc in the above classes. If you need the entire project for this, let me know. I tried it with NSZombies enabled and got a bit more info out of it: -[DoParsingStuff respondsToSelector:]: message sent to deallocated instance 0x6a52480 I am not using release/autorelease/retain etc. in this class...but it is being used in the mwfeedparser library.

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