【发布时间】：2011-03-05 04:54:34
【问题描述】：
尝试在 iPad 上使用 MPMoviePlayerController 播放电影时以及在使用 iOS 4.2 的 iPad 模拟器中播放电影时出现崩溃。我正在使用 xcode 3.2.5 和 4.2 SDK 构建。在使用 iOS 3.2 的 iPad 或 iPad 模拟器 3.2 中运行时，相同的代码可以正常工作，但在运行 4.2 的 iPad 或 iPad 模拟器 4.2 中，它会崩溃。崩溃是由于在可可库深处调用未知选择器的异常，某些东西试图在 UIButton 对象上调用名为“setHitRectInsets:”的选择器。此外，崩溃发生在控制返回到主事件循环之后。有人知道可能是什么原因造成的吗？这是崩溃的代码（粗略地说，删除了一些似乎没有任何影响的无关内容）：
NSString *fullMovieFilename = [[NSBundle mainBundle] pathForResource:@"movie" ofType:@"m4v"];
NSURL *movieURL = [NSURL fileURLWithPath:fullMovieFilename];
moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
moviePlayer.controlStyle = MPMovieControlStyleNone; // crash happens regardless of the setting here
[moviePlayer.view setFrame:self.view.bounds];
[self.view addSubview:moviePlayer.view];
[moviePlayer setFullscreen:YES animated:YES]; // crash happens whether i use fullscreen or not
[moviePlayer play];
如果我使用 Xcode 3.2.3 和 4.0 SDK 构建，同样的代码也适用。崩溃堆栈跟踪如下所示：
2011-03-04 23:08:22.017 MyApp[31610:207] -[UIButton setHitRectInsets:]: unrecognized selector sent to instance 0x990bc60
2011-03-04 23:08:22.020 MyApp[31610:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIButton setHitRectInsets:]: unrecognized selector sent to instance 0x990bc60'
*** Call stack at first throw:
(
0 CoreFoundation 0x0151abe9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x0166f5c2 objc_exception_throw + 47
2 CoreFoundation 0x0151c6fb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x0148c366 ___forwarding___ + 966
4 CoreFoundation 0x0148bf22 _CF_forwarding_prep_0 + 50
5 MediaPlayer 0x011b5bdb -[MPTransportControls createButtonForPart:] + 380
6 MediaPlayer 0x011b65d5 -[MPTransportControls _updateAdditions:removals:forPart:] + 110
7 MediaPlayer 0x011b4d78 -[MPTransportControls _reloadViewWithAnimation:] + 299
8 MediaPlayer 0x011b621a -[MPTransportControls setVisibleParts:] + 49
9 MediaPlayer 0x011b6e4a -[MPTransportControls initWithFrame:] + 173
10 MediaPlayer 0x011f9188 -[MPInlineTransportControls initWithFrame:] + 78
11 MediaPlayer 0x011f193a -[MPInlineVideoOverlay layoutSubviews] + 158
12 QuartzCore 0x00d6e451 -[CALayer layoutSublayers] + 181
13 QuartzCore 0x00d6e17c CALayerLayoutIfNeeded + 220
14 QuartzCore 0x00d6e088 -[CALayer layoutIfNeeded] + 111
15 MediaPlayer 0x011f130c -[MPInlineVideoOverlay setAllowsWirelessPlayback:] + 46
16 MediaPlayer 0x011f5b0d -[MPInlineVideoViewController _overlayView] + 526
17 MediaPlayer 0x011f6359 -[MPInlineVideoViewController _layoutForItemTypeAvailable] + 1350
18 Foundation 0x000e56c1 _nsnote_callback + 145
19 CoreFoundation 0x014f2f99 __CFXNotificationPost_old + 745
20 CoreFoundation 0x0147233a _CFXNotificationPostNotification + 186
21 Foundation 0x000db266 -[NSNotificationCenter postNotificationName:object:userInfo:] + 134
22 Foundation 0x000e75a9 -[NSNotificationCenter postNotificationName:object:] + 56
23 MediaPlayer 0x01184dd6 -[MPAVItem _updateForNaturalSizeChange] + 278
24 MediaPlayer 0x011818e4 __-[MPAVItem blockForDirectAVControllerNotificationReferencingItem:]_block_invoke_1 + 82
25 MediaPlayer 0x011899ba -[MPAVController _postMPAVControllerSizeDidChangeNotificationWithItem:] + 138
26 Foundation 0x000e56c1 _nsnote_callback + 145
27 CoreFoundation 0x014f2f99 __CFXNotificationPost_old + 745
28 CoreFoundation 0x0147233a _CFXNotificationPostNotification + 186
29 Foundation 0x000db266 -[NSNotificationCenter postNotificationName:object:userInfo:] + 134
30 Celestial 0x052a35b2 -[NSObject(NSObject_AVShared) postNotificationWithDescription:] + 176
31 Celestial 0x052ab214 -[AVController fpItemNotification:sender:] + 735
32 Celestial 0x052b5305 -[AVPlaybackItem fpItemNotificationInfo:] + 640
33 Celestial 0x052a3d5c -[AVObjectRegistry safeInvokeWithDescription:] + 211
34 Foundation 0x000fa9a6 __NSThreadPerformPerform + 251
35 CoreFoundation 0x014fc01f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
36 CoreFoundation 0x0145a28b __CFRunLoopDoSources0 + 571
37 CoreFoundation 0x01459786 __CFRunLoopRun + 470
38 CoreFoundation 0x01459240 CFRunLoopRunSpecific + 208
39 CoreFoundation 0x01459161 CFRunLoopRunInMode + 97
40 GraphicsServices 0x01e4f268 GSEventRunModal + 217
41 GraphicsServices 0x01e4f32d GSEventRun + 115
42 UIKit 0x0038a42e UIApplicationMain + 1160
43 MyApp 0x0000837a main + 102
44 MpApp 0x00002009 start + 53
)
terminate called after throwing an instance of 'NSException'
为此奋斗了好几天，并且在互联网上搜索了很多有类似问题的人，但都没有运气。任何建议将不胜感激。
【问题讨论】：
标签： ipad mpmovieplayercontroller