請換用AVPlayer播放！

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當點選某按鈕播放視訊時，如果在按鈕觸發函式時alloc MPMoviePlayerController物件，同時載入資原始檔，因為載入資原始檔也需要時間，這時會有一個短暫的黑色閃屏，這點體驗很不好，有一個好的解決方案是，提前alloc預載入好該MoviePlayer物件，點選按鈕時直接呼叫play。

預載入相關程式碼：

//預載入視訊，避免出現黑屏
    NSString *videoPath=[[NSBundle mainBundle]pathForResource:@"startVideo" ofType:@"mp4"];
    self.movieController=[[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:videoPath]];
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(movieFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:self.movieController];
    self.movieController.scalingMode=MPMovieScalingModeAspectFill;
    [self.view insertSubview:movieController.view belowSubview:bgImgView];
    self.movieController.view.frame=CGRectMake(0,0, 1024, 768);
    [self.movieController setControlStyle:MPMovieControlStyleNone];      //去掉進度條
    self.movieController.initialPlaybackTime = -1.0;
    [self.movieController setShouldAutoplay:NO];
    [self.movieController prepareToPlay];
 

注意：

1. [self.movieControllersetShouldAutoplay:NO];

    [self.movieControllerprepareToPlay];