我的视频无法使用 MPMoviePlayer 播放？xcode

Question

- (void)viewDidLoad
{
    NSString *movieFile1=[[NSBundle mainBundle]pathForResource:@"2" ofType:@"mp4"];
    self.moviePlayer=[[MPMoviePlayerController alloc]initWithContentURL:[NSURL fileURLWithPath:movieFile1]];

    [super viewDidLoad];
}

我将此视频转换为 mp4,mov,3gp,m4v ，但总是：

线程 1：信号 SIGABRT

请帮帮我！

我认为应该是格式的问题。因为当我使用来自 support.apple.com 的视频时
，此代码有效。那我该怎么办？

Answer 1

作为 [super viewDidLoad] 执行此操作；到顶部：

NSString *movieFile1=[[NSBundle mainBundle]pathForResource:@"2" ofType:@"mp4"];
if([[NSFileManager defaultManager] fileExistsAtPath:movieFile1])// check whether file exists
{
  self.moviePlayer=[[MPMoviePlayerController alloc]initWithContentURL:[NSURL fileURLWithPath:movieFile1]];
  if(self.moviePlayer) //reference of movie player created
  {
    [self.moviePlayer prepareToPlay];
    [self.moviePlayer.view setFrame: self.view.bounds]; 
    [self.view addSubview: player.view];
    [self.moviePlayer play];
  }
}