正確顯示和iOS 3.2（iPad版）駁回全屏的MPMoviePlayerController

Question

我有很多在我的iPad應用程序顯示一個全屏電影麻煩，然後允許用戶無論使用哪種完成按鈕或「非全屏」予以駁回播放器控制按鈕。

起初，我使用MPMoviePlayerViewController爲電影的介紹，但我並沒有從MPMoviePlayerController對象接收的進入/退出全屏通知，所以我切換到做我自己。

我可以讓電影全屏顯示（雖然過渡很快），但當按下「完成」或「非全屏」按鈕時，播放器不採取任何操作。我已爲我下面的代碼：

- (void)startPlayingMovieWithURLString:(NSString *)movieURLString { 
    // I get all of these callbacks **EXCEPT** the "willExitFullScreen:" callback. 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willEnterFullScreen:) name:MPMoviePlayerWillEnterFullscreenNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willExitFullScreen:) name:MPMoviePlayerWillExitFullscreenNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didFinishPlayback:) name:MPMoviePlayerPlaybackDidFinishNotification object:nil]; 

    [self.moviePlayerController setContentURL:someExistingURL]; 

     // "self" is a UIViewController subclass, and is presented as a "fullscreen" modal view controller from its parent 
     // I'm setting the movie player's view's frame to take up the full rectangle of my view controller, but really I want the movie to be completely removed when the user presses "done" (that is, removed from the view hierarchy). Not sure when/where to do this. 
    self.moviePlayerController.view.frame = self.view.frame; 
    [self.view addSubview:self.moviePlayerController.view]; 
    [self.moviePlayerController setFullscreen:YES animated:YES]; 

} 

這裏是我的didFinish回調

- (void)didFinishPlayback:(NSNotification *)notification { 
     // This ends up recursively telling the player that playback ended, thus calling this method, thus…well you get the picture. 
     // What I'm trying to do here is just make the player go away and show my old UI again. 
    [self.moviePlayerController setFullscreen:NO animated:YES]; 
} 

所以，很顯然，我做錯了什麼，但我已經起來的文檔，我下來的代碼無法弄清楚如何讓電影消失。我認爲這會比這更直觀。我究竟做錯了什麼？

Answer 1

這裏是如何發生的事件 - >通知的工作：

• 用戶按下 '完成' 按鈕

  • MPMoviePlayerWillExitFullscreenNotification
  • MPMoviePlayerDidExitFullscreenNotification

• 用戶按下 '離開全屏' 運輸按鈕

  • MPMoviePlayerWillExitFullscreenNotification
  • MPMoviePlayerDidExitFullscreenNotification
  • 注意播放不會停止

• 電影達到最終

  • MPMoviePlayerPlaybackDidFinishNotification與MPMoviePlayerPlaybackDidFinishReasonUserInfoKey設置爲MPMovieFinishReasonPlaybackEnded
  • 如果你打電話給你的MoviePlayerController實例setFullscreen:NO animated:YES從這個通知時，會再拿到WillExit和DidExit通知。
  • 請注意，當用戶按下「完成」或「離開全屏」按鈕時，您不會收到PlaybackDidFinish通知。

所以，通常情況下，如果你想擺脫MoviePlayer的看法，你需要把[self.moviePlayerController.view removeFromSuperview]在DidExitFullscreen通知處理程序。 WillExitFullscreen太早。

這裏是我的代碼：

- (void)willEnterFullscreen:(NSNotification*)notification { 
    NSLog(@"willEnterFullscreen"); 
} 

- (void)enteredFullscreen:(NSNotification*)notification { 
    NSLog(@"enteredFullscreen"); 
} 

- (void)willExitFullscreen:(NSNotification*)notification { 
    NSLog(@"willExitFullscreen"); 
} 

- (void)exitedFullscreen:(NSNotification*)notification { 
    NSLog(@"exitedFullscreen"); 
    [self.movieController.view removeFromSuperview]; 
    self.movieController = nil; 
    [[NSNotificationCenter defaultCenter] removeObserver:self]; 
} 

- (void)playbackFinished:(NSNotification*)notification { 
    NSNumber* reason = [[notification userInfo] objectForKey:MPMoviePlayerPlaybackDidFinishReasonUserInfoKey]; 
    switch ([reason intValue]) { 
     case MPMovieFinishReasonPlaybackEnded: 
      NSLog(@"playbackFinished. Reason: Playback Ended");   
       break; 
     case MPMovieFinishReasonPlaybackError: 
      NSLog(@"playbackFinished. Reason: Playback Error"); 
       break; 
     case MPMovieFinishReasonUserExited: 
      NSLog(@"playbackFinished. Reason: User Exited"); 
       break; 
     default: 
      break; 
    } 
    [self.movieController setFullscreen:NO animated:YES]; 
} 

- (void)showMovie { 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willEnterFullscreen:) name:MPMoviePlayerWillEnterFullscreenNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willExitFullscreen:) name:MPMoviePlayerWillExitFullscreenNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(enteredFullscreen:) name:MPMoviePlayerDidEnterFullscreenNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(exitedFullscreen:) name:MPMoviePlayerDidExitFullscreenNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackFinished:) name:MPMoviePlayerPlaybackDidFinishNotification object:nil]; 

    NSURL* movieURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"tron" ofType:@"mov"]]; 
    self.movieController = [[MPMoviePlayerController alloc] initWithContentURL:movieURL]; 
    self.movieController.view.frame = self.view.frame; 
    [self.view addSubview:movieController.view]; 
    [self.movieController setFullscreen:YES animated:YES]; 
    [self.movieController play]; 
} 

Answer 2

是。那很棒。真的有上面提到的通知...

但是，沒有MPMoviePlayerPlaybackWillFinishNotification somewhy !!! 這確實是一個問題。

當你調用電影播放器​​模式（無論其使用以下方法presentViewController/presentModalViewController/presentVideoController），如果定義.fullScreen = YES，它預計不會叫MPMoviePlayerWillExitFullscreenNotification通知所有（顯然，因爲我們不是從全屏進入/退出，而只是呈現/解散控制器）。

但是確實沒有任何視頻即將完成和關閉的通知。這是需要的（除了可能的其他情況），以趕上解僱過渡開始的時刻。 （當然，轉換在調用MPMoviePlayerPlaybackDidFinishNotification之前開始）。同時，應用程序：supportedInterfaceOrientationsForWindow：對於先前顯示的控制器在通知之前調用，並且沒有辦法說AppDelegate我們當前的控制器必須以另一個方向顯示。因爲我的視頻是全屏，也沒有顯示任何控制（這是一種介紹，所以我只是直到它完成）我的解決方案是隻是有一個計時器，它會檢查每個短嘀嗒聲（0.1秒）什麼是視頻當前位置 ...它接近尾聲，那麼這是我自己通知的時刻。