MPMoviePlayerController僅顯示白色背景

Question

在我的應用程序中我想在MPMoviePlayerController中播放視頻，但是當我運行該應用程序時，它僅顯示白色框架。下面的代碼：

NSBundle *bundle = [NSBundle mainBundle]; 
NSString *moviePath = [bundle pathForResource:@"Problems" ofType:@"MP4"]; 
NSLog(@"path: %@", moviePath); 
//NSURL *movieURL = [NSURL fileURLWithPath:moviePath]; 
MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:moviePath]]; 
player.view.frame = CGRectMake(0, 0, 700, 700); 
player.view.backgroundColor = [UIColor whiteColor]; 
player.controlStyle = MPMovieControlStyleDefault; 
player.shouldAutoplay = YES; 
[self.detailView addSubview:player.view]; 
[player play]; 

編輯：我想這代碼，而不是，並增加了@property了的MPMoviePlayerController。我現在可以看到玩家，但應用程序崩潰並且斷點無法識別位置。下面的代碼：

self.player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Problems" ofType:@"MP4"]]]; 
[self.player.view setFrame:CGRectMake(0, 0, 320, 320)]; 

[self.detailView addSubview:self.player.view]; 
[self.player play]; 

Answer 1

應使用方法 'presentMoviePlayerViewControllerAnimated：'：

[self presentMoviePlayerViewControllerAnimated:self.player];