iPhone - 在3.0和4.0 OS/SDK上播放视频？

Question

从3.2 iPhone OS SDK开始,播放视频确实与众不同.

所以我想知道是否有一种方法可以使用兼容代码(<和> 3.2)全屏播放视频,而无需为这两种情况编写代码.

我想我们必须写两个版本的类来处理视频播放......

你的!

Answer 1

我基本上按照上面 Jeff Kelly 的建议在 3.1 及更高版本上运行，请注意instancesRespondToSelector 调用：

// Initialize a movie player object with the specified URL
MPMoviePlayerController *mp = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
if (mp)
{

    // Register to receive a notification when the movie has finished playing. 
    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(moviePlayBackDidFinish:) 
                                                 name:MPMoviePlayerPlaybackDidFinishNotification 
                                               object:nil];


    //Will only run this code for >= OS 3.2 
    if ([MPMoviePlayerController instancesRespondToSelector:@selector(setFullscreen:animated:)]){   

        [[NSNotificationCenter defaultCenter] addObserver:self 
                                                 selector:@selector(moviePlayBackStateDidChange:) 
                                                     name:MPMoviePlayerPlaybackStateDidChangeNotification 
                                                   object:nil];
        [[NSNotificationCenter defaultCenter] addObserver:self 
                                                 selector:@selector(nowPlayingMovieDidChange:) 
                                                     name:MPMoviePlayerNowPlayingMovieDidChangeNotification 
                                                   object:nil];
        [[NSNotificationCenter defaultCenter] addObserver:self 
                                                 selector:@selector(moviePlayBackDidFinish:) 
                                                     name:MPMoviePlayerDidExitFullscreenNotification 
                                                   object:nil];

        mp.controlStyle = MPMovieControlStyleFullscreen;


        [mp setScalingMode:MPMovieScalingModeAspectFit];

                    //change mainMenu here to whatever your parent view is
        [mp.view setFrame:mainMenu.frame];
        [self.view addSubview:mp.view];



        [mp setFullscreen:YES animated:NO];
    }
//continue as normal

然后在 moviePlayBackDidFinish 函数中，我使用相同的技术来删除通知。