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我正在使用情节提要-我对此很陌生-

当我单击一个EXC_BAD_ACCESS 指向code=2.address = 0x4MPMoviePlayerViewController

为了让您了解我到目前为止所获得的信息：我ViewControllers在同一个ViewController.h/m 类下有几个不同的，导航由 .h/m 控制NavigationController。我从 a NavControllerand single开始，ViewController并一直ViewControllers用简单的 CTRL-Click button-to-new- 链接 new- ViewController。我添加了一个新的ViewController；将其类更改MPMoviePlayerViewController为身份检查器的自定义类部分，但是当我单击按钮开始转换时，我不断收到此错误。

ViewController.h如果相关，这是我的代码：

- (IBAction)postToTwitter:(id)sender {
    if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]) {
        SLComposeViewController *tweetSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
        [tweetSheet setInitialText:@"Check this out!"];
        [self presentViewController:tweetSheet animated:YES completion:nil];
    }
}
- (IBAction)postToFacebook:(id)sender {
    if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook]) {
        SLComposeViewController *controller = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
        [controller setInitialText:@"Posted from IOS App Test -- It works!"];
        [self presentViewController:controller animated:YES completion:Nil];
    }
}
- (IBAction)playVideo1:(id)sender {
    NSURL * url = [[NSURL alloc]initWithString:@"link omitted"];
    //create our moviePlayer
    moviePlayer = [[MPMoviePlayerController alloc]initWithContentURL:url];
    [self.view addSubview:moviePlayer.view];

    //Some additional customization
    moviePlayer.fullscreen = YES;
    moviePlayer.allowsAirPlay = YES;
    moviePlayer.shouldAutoplay = NO;
    moviePlayer.controlStyle = MPMovieControlStyleDefault;
}
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