iphone MPMoviePlayerViewController處理網絡問題（黑屏）

Question

嘿，我用MPMoviePlayerViewController來顯示視頻。我不知道如何處理網絡問題。我想解僱錯誤的MPMoviePlayerViewController控制器。 dismissMoviePlayerViewControllerAnimated方法僅在第一次運行，第二次出現黑屏。

示例代碼：

// VideoViewController.h 
#import <MediaPlayer/MediaPlayer.h> 
@interface VideoViewController : MPMoviePlayerViewController 
{ 
} 
@end 

// VideoViewController.m 
@implementation VideoViewController 
- (void)viewDidLoad 
{ 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieDidLoad:) name:MPMoviePlayerContentPreloadDidFinishNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieDidLoad:) name:MPMoviePlayerPlaybackDidFinishNotification object:nil]; 
} 

-(void)movieDidLoad:(NSNotification*)notification 
{ 
    [self dismissMoviePlayerViewControllerAnimated]; 
} 
@end 

// XController's function to call it 
- (void)showVideoView 
{ 
    VideoViewController * controller = [[VideoViewController alloc] initWithContentURL:[NSURL URLWithString:@"http://myvideos.com/movie.m4v"]]; 
    [self presentMoviePlayerViewControllerAnimated:controller]; 
    [controller.moviePlayer play]; 
    [controller release]; 
} 

請告訴我如何處理網絡問題。另請注意，該視頻始終處於全屏狀態。

Answer 1

爲什麼你創建VideoViewController有什麼特別的原因？如果你想自定義某些東西，那麼你可以做所有的事情而不需要創建它。其他的事情是，這兩個通知你已經註冊了「movieDidLoad」這個方法，這將消除你的觀點。當視頻準備播放時，你的視圖將被解僱，因爲你註冊了「MPMoviePlayerContentPreloadDidFinishNotification」這個方法。此鏈接將幫助您更多：

- (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]; 

}