MPMoviePlayer错误加载文件

Question

我想使用MPMoviePlayer来播放一个简单的电影，我不断在控制台（但电影播放）得到这个错误：我的xcode版本是4.3.1。

2012-03-24 14:51:49.488 european_culture[450:17a07] Error loading /System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn: dlopen(/System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn, 262): Symbol not found: ___CFObjCIsCollectable 
Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security 
Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 
in /System/Library/Frameworks/Security.framework/Versions/A/Security 
2012-03-24 14:51:49.496 european_culture[450:17a07] Error loading /System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn: dlopen(/System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn, 262): Symbol not found: ___CFObjCIsCollectable 
Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security 
Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 
in /System/Library/Frameworks/Security.framework/Versions/A/Security 
2012-03-24 14:51:49.584 european_culture[450:17a07] Error loading /System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn: dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn, 262): Symbol not found: ___CFObjCIsCollectable 
Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security 
Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 
in /System/Library/Frameworks/Security.framework/Versions/A/Security 
2012-03-24 14:51:49.592 european_culture[450:17a07] Error loading /System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn: dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn, 262): Symbol not found: ___CFObjCIsCollectable 
Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security 
Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 
in /System/Library/Frameworks/Security.framework/Versions/A/Security 
2012-03-24 14:51:49.610 european_culture[450:17a07] Error loading /System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn: dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn, 262): Symbol not found: ___CFObjCIsCollectable 
Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security 
Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 
in /System/Library/Frameworks/Security.framework/Versions/A/Security 
2012-03-24 14:51:49.617 european_culture[450:17a07] Error loading /System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn: dlopen(/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn, 262): Symbol not found: ___CFObjCIsCollectable 
Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security 
Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 
in /System/Library/Frameworks/Security.framework/Versions/A/Security 
2012-03-24 14:51:51.749 european_culture[450:13a03] Unbalanced calls to begin/end appearance transitions for <MPMoviePlayerViewController: 0x935f500>. 
2012-03-24 14:51:51.930 european_culture[450:15303] AQMixerDevice::SetMixerChannelLayout(0x7d47f50): scope 1, element 1, layout: tag=0x640001: error -10851 

但是我测试了我的iPad（5.1）和消息是不同的。（电影播放，太。）

Unbalanced calls to begin/end appearance transitions for <MPMoviePlayerViewController: 0xf6a0c40>. 

什么问题？ 这里是我的代码按我的按钮时应该发挥电影：

-(void)playMovie:(NSString *)fileName 
{ 
NSString *movieFile = [[NSBundle mainBundle] pathForResource:fileName ofType:@"mov"]; 
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:movieFile]; 
MPMoviePlayerViewController *tempMoviePlayer = [[MPMoviePlayerViewController alloc] initWithContentURL:fileURL]; 
MPMoviePlayerController *moviePlayer = [tempMoviePlayer moviePlayer]; 

[tempMoviePlayer.view setFrame:CGRectMake(0, 0, 1024, 768)]; 
[_zoomImageView addSubview: tempMoviePlayer.view]; 
[self presentMoviePlayerViewControllerAnimated:tempMoviePlayer]; 
[self setWantsFullScreenLayout:YES]; 
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playMovieFinished:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer]; 
[moviePlayer play]; 

[fileURL release]; 
[tempMoviePlayer release]; 
} 

PLZ，帮助我。
非常感谢。

Answer 1

这是iOS SDK 5/Simulator的确认错误 - 只要模拟器尝试播放声音（从电影或任何其他声源）就会发生。不要担心，但实际设备上不会有问题。

您提到了用户在使用您的应用时遇到问题的实际报告 - 这些问题与您上面发布的问题没有关联/关联。

此问题由Apple根据Bug ID＃10555404提交。我自己提交了一份报告，最终被识别为所提到的bug ID的一个重复。

该问题目前一直存在，直到包括Xcode版本4.3.2（4E2002），iOS SDK 5.1。

可能会出现此问题如果您错误地导入Mac OSX框架而不是iOs框架。删除Mac OS框架适用于我。

记得设置委托（self.player.delegate =个体经营），并使用委托的方法进行清理：

-(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)playedSuccessfully 
{ 
     self.player = nil; 
} 

从here