声明失败：电影播放器启动状态错误（1）
我正在一个iPad应用程序中播放一个video（m4v），然后转到另一个video控制器播放另一个video。 它玩的很好，但是当第二个video完成播放，然后抛出断言失败。
错误是：
*** Assertion failure in -[MPMoviePlayerControllerNew _moviePlayerDidBecomeActiveNotification:], /SourceCache/MobileMusicPlayer_Sim/MobileMusicPlayer-1137.39/SDK/MPMoviePlayerController.m:1236 *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'movie player <MPMoviePlayerControllerNew: 0x623f6b0> has wrong activation state (1)' *** Call stack at first throw: ( 0 CoreFoundation 0x015e35a9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x01737313 objc_exception_throw + 44 2 CoreFoundation 0x0159bef8 +[NSException raise:format:arguments:] + 136 3 Foundation 0x001ea3bb -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 116 4 MediaPlayer 0x00522850 -[MPMoviePlayerControllerNew _moviePlayerDidBecomeActiveNotification:] + 204 5 Foundation 0x00159669 _nsnote_callback + 145 6 CoreFoundation 0x015bb9f9 __CFXNotificationPost_old + 745 7 CoreFoundation 0x0153a93a _CFXNotificationPostNotification + 186 8 Foundation 0x0014f20e -[NSNotificationCenter postNotificationName:object:userInfo:] + 134 9 MediaPlayer 0x00521e08 -[MPMoviePlayerControllerNew _postNotificationName:object:] + 56 10 MediaPlayer 0x005293f7 -[MPMoviePlayerControllerNew _ensureActive] + 158 11 MediaPlayer 0x005242e8 -[MPMoviePlayerControllerNew setControlStyle:] + 45 12 Restore Sensor 0x00073cfe -[MRSPresentationSlide2 viewDidLoad] + 334 13 UIKit 0x00958089 -[UIViewController view] + 179 14 Restore Sensor 0x00071ed8 -[MRSPresentationController pushViewOnScreen:] + 632 15 Restore Sensor 0x0007395d -[MRSPresentationSlide1 moviePlayBackDidFinish:] + 365 16 Foundation 0x00159669 _nsnote_callback + 145 17 CoreFoundation 0x015bb9f9 __CFXNotificationPost_old + 745 18 CoreFoundation 0x0153a93a _CFXNotificationPostNotification + 186 19 Foundation 0x0014f20e -[NSNotificationCenter postNotificationName:object:userInfo:] + 134 20 MediaPlayer 0x00521d24 -[MPMoviePlayerControllerNew _postDidFinishNotificationWithUserInfo:] + 69 21 Foundation 0x00159669 _nsnote_callback + 145 22 CoreFoundation 0x015bb9f9 __CFXNotificationPost_old + 745 23 CoreFoundation 0x0153a93a _CFXNotificationPostNotification + 186 24 Foundation 0x0014f20e -[NSNotificationCenter postNotificationName:object:userInfo:] + 134 25 MediaPlayer 0x0053d974 -[MPAVController _itemPlaybackDidEndNotification:] + 491 26 Foundation 0x00159669 _nsnote_callback + 145 27 CoreFoundation 0x015bb9f9 __CFXNotificationPost_old + 745 28 CoreFoundation 0x0153a93a _CFXNotificationPostNotification + 186 29 Foundation 0x0014f20e -[NSNotificationCenter postNotificationName:object:userInfo:] + 134 30 Celestial 0x025907a7 -[NSObject(NSObject_AVShared) postNotificationWithDescription:] + 176 31 Celestial 0x02594a7d -[AVController itemHasFinishedPlayingNotification:] + 169 32 Celestial 0x025989ca -[AVController fpItemNotification:sender:] + 2177 33 Celestial 0x025a2a8d -[AVPlaybackItem fpItemNotificationInfo:] + 1473 34 Celestial 0x02590f51 -[AVObjectRegistry safeInvokeWithDescription:] + 211 35 Foundation 0x0016e94e __NSThreadPerformPerform + 251 36 CoreFoundation 0x015c48ff __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 37 CoreFoundation 0x0152288b __CFRunLoopDoSources0 + 571 38 CoreFoundation 0x01521d86 __CFRunLoopRun + 470 39 CoreFoundation 0x01521840 CFRunLoopRunSpecific + 208 40 CoreFoundation 0x01521761 CFRunLoopRunInMode + 97 41 GraphicsServices 0x0304f1c4 GSEventRunModal + 217 42 GraphicsServices 0x0304f289 GSEventRun + 115 43 UIKit 0x008b6c93 UIApplicationMain + 1160 44 Restore Sensor 0x00002121 main + 177 45 Restore Sensor 0x00002065 start + 53 ) terminate called throwing an exception 任何人都知道为什么我会得到这个错误？
我发现了这个问题。 第一个video没有删除MPMoviePlayerPlaybackDidFinishNotification通知，所以第二个video多次加载。
如果您有多个MoviePlayers，请确保您只在该播放器上注册通知。 例如：
NSNotificationCenter *center = [NSNotificationCenter defaultCenter]; [center addObserver:self selector:@selector(moviePlaybackStateChanged:) name:MPMoviePlayerPlaybackDidFinishNotification object:self.movieController];
这可以确保您只收到来自正确玩家的通知。
至less为我修好了。
只需停止播放器在再次初始化之前。
[PlayerName停止];