iPhone SDK 4：怪异编译错误，的MPMoviePlayerController

我有含有下列方法的viewController：iPhone SDK 4：怪异编译错误，的MPMoviePlayerController

- (IBAction) playMovie { 
    NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"test" ofType:@"m4v"]]; 

    MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDidFinish:) 
             name:MPMoviePlayerPlaybackDidFinishNotification 
             object:moviePlayer]; 

    moviePlayer.controlStyle = MPMovieControlStyleNone; 
    moviePlayer.shouldAutoplay = YES; 

    [self.view addSubview:moviePlayer.view]; 
    [moviePlayer setFullscreen:YES animated:YES]; 
}

我不能编译，因为错误的代码：

未定义符号：

"_MPMoviePlayerPlaybackDidFinishNotification", referenced from: 
     _MPMoviePlayerPlaybackDidFinishNotification$non_lazy_ptr in AnotherViewController.o 
    (maybe you meant: _MPMoviePlayerPlaybackDidFinishNotification$non_lazy_ptr) 
    "_OBJC_CLASS_$_MPMoviePlayerController", referenced from: 
     objc-class-ref-to-MPMoviePlayerController in AnotherViewController.o 
ld: symbol(s) not found 
collect2: ld returned 1 exit status

这条消息对我没有意义。

我打算使用这种方法作为视图控制器的一部分。我是否必须为玩家创建单独的视图控制器，或者情况并非如此？

我在创建此项目时使用SDK 3.1.2，但playMovie方法根据新的API规则完全重写。当前的SDK版本是4.0.1

来源

2010-08-12 ufw

您添加了MediaPlayer.framework框架？

来源

2010-08-12 02:40:22

iPhone SDK 4：怪异编译错误，的MPMoviePlayerController

回答

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