Ios 电影播放错误-零字符串

我试图在ios上播放一部电影，但总是出错

我的代码：

-(IBAction)playMovie:(id)sender

NSString *filepath   =   [[NSBundle mainBundle] pathForResource:@"big-buck-bunny-clip" ofType:@"m4v"];
NSURL    *fileURL    =   [NSURL fileURLWithPath:filepath];
MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moviePlaybackComplete:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:moviePlayerController];
[self.view addSubview:moviePlayerController.view];
moviePlayerController.fullscreen = YES;
[moviePlayerController play];

}

}

错误是：

由于未捕获异常而终止应用程序 “NSInvalidArgumentException”，原因：“***-[NSURL initFileURLWithPath:：nil字符串参数'

---

好的，我知道了。。我忘了在构建阶段添加文件

您应该添加更明确的细节，使其成为正确的答案。

- (void)moviePlaybackComplete:(NSNotification *)notification

MPMoviePlayerController *moviePlayerController = [notification object];
[[NSNotificationCenter defaultCenter] removeObserver:self
                                                name:MPMoviePlayerPlaybackDidFinishNotification
                                              object:moviePlayerController];
[moviePlayerController.view removeFromSuperview];


[moviePlayerController.view setFrame:CGRectMake(38, 100, 250, 163)];
[self.view addSubview:moviePlayerController.view];
//moviePlayerController.fullscreen = YES;
[moviePlayerController play];