StackOverflow2013

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POException with playing audio file by using MPMoviePlayerController
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copied!<p>I used MPMoviePlayerController to play autio in local or url. When I first to play a information,I should download the file and play at the same time.Then the second time ,I can play the information from local if it existed.</p> <p>Now I create a Singleton named PlayController to control autoPlay，play ，pause，stop By manually. If I choose a picture，it will autoplay the file consistent to the picture.If it can not get the playstatus，user should play it by yourself.I can clicked different picture to play the correct audio.</p> <p>The problem I met is that when I clickked a different picture，sometimes the bug will jump as the uploaded screenshot.</p> <p><strong>init the Singleton：</strong></p> <pre><code>-(PlayController*)initWithScenicspot:(ScenicSpot*)sp { pauseimg=[UIImage imageNamed:@"ReadyPlay.png"]; playimg=[UIImage imageNamed:@"ReadyPause.png"]; if (![currentScenicSpot.scenicSpotId isEqualToString:sp.scenicSpotId]) { currentScenicSpot=[sp retain]; self=[super init]; if (self) { if(!pcontroller){ pcontroller = [[MPMoviePlayerController alloc] init]; } [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(loginfo) userInfo:nil repeats:YES]; [self.view setBackgroundColor:[UIColor blueColor]]; detailView=[[DetailView alloc]initWithFrame:[[UIScreen mainScreen] bounds]]; detailView._clickbutton=self; [self.view addSubview:detailView]; self.view.frame=[[UIScreen mainScreen] bounds]; NSURL* ns = nil /*=[HelpTools returnSpotAudioServerPath:sp.scenicSpotId]*/; NSString *audioDiskPath = [HelpTools returnSpotAudioDiskPath:sp.scenicSpotId]; NSString *audioServerPath = [HelpTools returnSpotAudioServerPath:sp.scenicSpotId]; // NSURL* ns = nil; BOOL isNet = NO; if ([HelpTools isFileExist:audioDiskPath]) { ns = [NSURL fileURLWithPath:audioDiskPath]; } else{ ns = [NSURL URLWithString: audioServerPath]; [self downloadAudio:sp.scenicSpotId]; isNet = YES; } [self setContentUrl:ns isNet:isNet]; </code></pre> <p><strong>set the audio path</strong></p> <pre><code>-(void)setContentUrl:(NSURL*)url isNet:(BOOL)isNetData { if (isNetData) { if ([pcontroller respondsToSelector:@selector(loadState)]) { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handlePlayback:) name:MPMoviePlayerLoadStateDidChangeNotification object:nil]; [pcontroller setContentURL:url]; [detailView.coloredplaybar setProgress:0 animated:NO]; [pcontroller prepareToPlay]; } else { [detailView.coloredplaybar setProgress:0 animated:NO]; [pcontroller play]; } } else { [detailView.coloredplaybar setProgress:0 animated:NO]; if (pcontroller.playbackState){ [pcontroller play]; } } </code></pre> <p><strong>update playstatus</strong></p> <pre><code>-(void)loginfo { if (pcontroller.playbackState) { float playprocess=(float)pcontroller.currentPlaybackTime/(float)pcontroller.duration; [detailView.coloredplaybar setProgress:playprocess]; if (pcontroller.playbackState==MPMoviePlaybackStateStopped|| pcontroller.playbackState==MPMoviePlaybackStatePaused) { [detailView.playControllButton setImage:playimg forState:UIControlStateNormal]; } else { [detailView.playControllButton setImage:pauseimg forState:UIControlStateNormal]; } } else { [detailView.playControllButton setImage:playimg forState:UIControlStateNormal]; } } - (void)handlePlayback:(NSNotification *)notif { MPMoviePlayerController *theMovie = (MPMoviePlayerController*)[notif object]; if ([theMovie loadState] != MPMovieLoadStateUnknown) { [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerLoadStateDidChangeNotification object:nil]; if ([PlayController getPlayer].loadState == MPMovieLoadStatePlaythroughOK) { if (pcontroller.playbackState && pcontroller.playbackState == MPMoviePlaybackStatePlaying) { [pcontroller play]; } } } } </code></pre> <p><strong>debug</strong></p> <pre><code>com.apple.coremedia.player.async:EXC_BAD_ACCESS(code = 1,address = 0X4) </code></pre> <p><strong>crash file</strong></p> <pre><code>Incident Identifier: 3CF84469-2C6A-42F8-8DB7-490A8BCB7FCE CrashReporter Key: 3bb7c18d7a7efc7433f20023298207ebb260efd2 Hardware Model: iPhone3,1 Process: HorticulturalJinZhou [1761] Path: /var/mobile/Applications/6A4BA4E5-DDF6-4CF5-A9DC-685C2FE4B799/HorticulturalJinZhou.app/HorticulturalJinZhou Identifier: HorticulturalJinZhou Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2013-01-24 12:27:37.314 +0800 OS Version: iPhone OS 5.0.1 (9A405) Report Version: 104 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x00000004 Crashed Thread: 10 ![enter image description here][1]![enter image description here][2]![enter image description here][3]![enter image description here][4] ![enter image description here][5]![enter image description here][6] Thread 10 name: com.apple.coremedia.player.async Thread 10 Crashed: 0 WebCore 0x3654b098 WebCore::TimerBase::setNextFireTime(double) + 116 1 WebCore 0x36590862 WebCore::FrameView::layout(bool) + 106 2 WebCore 0x365a8d32 WebCore::FrameView::updateLayoutAndStyleIfNeededRecursive() + 86 3 WebKit 0x34e5e898 -[WebHTMLView(WebInternal) _web_updateLayoutAndStyleIfNeededRecursive] + 36 4 WebKit 0x34e5e79a -[WebHTMLView(WebPrivate) viewWillDraw] + 74 5 CoreFoundation 0x341157fc -[NSObject performSelector:] + 32 6 CoreFoundation 0x3411648a -[NSArray makeObjectsPerformSelector:] + 146 7 CoreFoundation 0x341157fc -[NSObject performSelector:] + 32 8 CoreFoundation 0x3411648a -[NSArray makeObjectsPerformSelector:] + 146 9 CoreFoundation 0x341157fc -[NSObject performSelector:] + 32 10 CoreFoundation 0x3411648a -[NSArray makeObjectsPerformSelector:] + 146 11 CoreFoundation 0x341157fc -[NSObject performSelector:] + 32 12 CoreFoundation 0x3411648a -[NSArray makeObjectsPerformSelector:] + 146 13 WebKit 0x34e5e746 -[WebView(WebPrivate) viewWillDraw] + 86 14 WebCore 0x365a8a6a WebCore::TileCache::prepareToDraw() + 46 15 WebCore 0x36c05270 -[TileLayer layoutSublayers] + 36 16 QuartzCore 0x34ca5f92 CA::Layer::layout_if_needed(CA::Transaction*) + 210 17 QuartzCore 0x34caa114 CA::Context::commit_transaction(CA::Transaction*) + 220 18 QuartzCore 0x34ca9e50 CA::Transaction::commit() + 308 19 QuartzCore 0x34ca9784 CA::Transaction::pop() + 120 20 QuartzCore 0x34ca9704 +[CATransaction commit] + 28 21 MediaToolbox 0x34f30bf0 playerremote_AddToPlayQueue + 356 22 MediaToolbox 0x34f1c540 playerasync_grabAndRunOneCommand + 808 23 MediaToolbox 0x34f1bfd2 fpa_AsyncMovieControlThread + 42 24 CoreMedia 0x320d7bc6 figThreadMain + 146 25 libsystem_c.dylib 0x32f5cc16 _pthread_start + 314 26 libsystem_c.dylib 0x32f5cad0 thread_start + 0 </code></pre>

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