使用MPMoviePlayerViewController时髦的错误

有谁知道这些错误是什么意思？ 当我点击一个button来播放video时，我可以得到这个信息（通过networking按需下载）。

我遇到的问题是我的video没有audio播放。 实际上audio音量栏在加载时完全消失。

我觉得这跟这个错误有关。 

~~>>SponViewController :sponButton: 2011-10-26 12:52:04.212 myapp[2692:12e03] 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: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-10-26 12:52:04.222 myapp[2692:12e03] 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: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-10-26 12:52:04.258 myapp[2692:12e03] 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: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-10-26 12:52:04.269 myapp[2692:12e03] 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: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-10-26 12:52:04.293 myapp[2692:12e03] 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: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-10-26 12:52:04.307 myapp[2692:12e03] 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: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-10-26 12:52:04.340 myapp[2692:12e03] 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: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-10-26 12:52:04.351 myapp[2692:12e03] 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: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security.framework/Versions/A/Security 2011-10-26 12:52:04.442 myapp[2692:12e03] Error loading /System/Library/Extensions/IOBluetoothFamily.kext/Contents/PlugIns/IOBluetoothSCOAudioDriver.kext/Contents/Resources/IOBluetoothSCOAudioDriverPlugIn.bundle/Contents/MacOS/IOBluetoothSCOAudioDriverPlugIn: dlopen(/System/Library/Extensions/IOBluetoothFamily.kext/Contents/PlugIns/IOBluetoothSCOAudioDriver.kext/Contents/Resources/IOBluetoothSCOAudioDriverPlugIn.bundle/Contents/MacOS/IOBluetoothSCOAudioDriverPlugIn, 262): Symbol not found: _objc_assign_ivar Referenced from: /System/Library/Frameworks/IOBluetooth.framework/Versions/A/Frameworks/CoreBluetooth.framework/Versions/A/CoreBluetooth Expected in: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/usr/lib/libobjc.A.dylib in /System/Library/Frameworks/IOBluetooth.framework/Versions/A/Frameworks/CoreBluetooth.framework/Versions/A/CoreBluetooth 2011-10-26 12:52:04.453 myapp[2692:12e03] Error loading /System/Library/Extensions/IOBluetoothFamily.kext/Contents/PlugIns/IOBluetoothSCOAudioDriver.kext/Contents/Resources/IOBluetoothSCOAudioDriverPlugIn.bundle/Contents/MacOS/IOBluetoothSCOAudioDriverPlugIn: dlopen(/System/Library/Extensions/IOBluetoothFamily.kext/Contents/PlugIns/IOBluetoothSCOAudioDriver.kext/Contents/Resources/IOBluetoothSCOAudioDriverPlugIn.bundle/Contents/MacOS/IOBluetoothSCOAudioDriverPlugIn, 262): Symbol not found: _objc_assign_ivar Referenced from: /System/Library/Frameworks/IOBluetooth.framework/Versions/A/Frameworks/CoreBluetooth.framework/Versions/A/CoreBluetooth Expected in: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/usr/lib/libobjc.A.dylib in /System/Library/Frameworks/IOBluetooth.framework/Versions/A/Frameworks/CoreBluetooth.framework/Versions/A/CoreBluetooth

HDA是一种audio格式（http://en.wikipedia.org/wiki/Intel_High_Definition_Audio）。 由于Mac使用不同的audio和video驱动程序，因此在某些情况下audio或videotypes将无法在模拟器中播放，因为它实际上并未实现设备上的完整软件堆栈。 在这种情况下，它看起来像您的video使用的HDAaudio的驱动程序不能在Mac上使用。

这并不意味着您的Mac无法播放HDAaudio，只是iOS正在查找的确切插件不可用。 所以它只是禁用video的audio部分，然后继续播放。

过去，您曾经无法在模拟器中播放YouTubevideo，但他们可以在设备上正常工作。 这又是一个缺less插件的情况。 较新版本的iOS模拟器有一个存根插件，用于转换Mac的function和模拟器如何访问它们。

您是否在项目的构build设置中添加了所提到的框架？

对我来说，它看起来像框架被引用，而不会出现在你的二进制文件。

要添加所需的框架，您可以执行以下步骤：

  1. 在Xcode中打开你的项目
  2. 点击项目导航器中的根项目
  3. select你的目标
  4. 转到Build Phases并展开Link with libraries
  5. 确保提到的框架在这​​里列出。
  6. 如果他们不存在添加并重build您的应用程序

我希望这有帮助

音量条应该消失 – 它的行为就像是连接到一个原始的线路输出设备。 确保你的电脑声音也是…

至于错误 – 我有一个类似的问题，我的应用程序，尽pipe得到类似的错误，没有任何实际问题。 经验法则是，如果它在设备上工作，你很好。

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