如何从应用程序中调用mpmovielayer将在ppdelegate中辞职

Question

我正在使用mpmovieplayer播放音频流。我在处理入侵时遇到了麻烦，例如接到电话时。我的玩家在viewcontroller中声明，我认为我需要在appdelegate中的applicationdidresignactive中做一些事情，对吗？如果appdelegate不知道我的moviePlayer，我该怎么做？我是iPhone开发的新手，所以我边学习边享受：）

以下是我在viewcontroller 中所做的工作

-(IBAction)play1MButton:(id)sender{
    [[NSNotificationCenter defaultCenter] addObserver:self 
        selector:@selector(moviePlayerStatus:) 
        name:MPMoviePlayerPlaybackStateDidChangeNotification 
        object:nil];
    NSString *url = @"http://22.22.22.22:8000/listen.pls";
    [self.activityIndicator startAnimating];
    moviePlayer = [[MPMoviePlayerController alloc]
        initWithContentURL:[NSURL URLWithString:url]];
    [moviePlayer prepareToPlay];
    [[NSNotificationCenter defaultCenter] addObserver:self 
        selector:@selector(moviePlayerLoadStateChanged:) 
        name:MPMoviePlayerLoadStateDidChangeNotification 
        object:nil];
}
-(void) moviePlayerStatus:(NSNotification*)notification {
    //MPMoviePlayerController *moviePlayer = notification.object;
    MPMoviePlaybackState playbackState = moviePlayer.playbackState;
    if(playbackState == MPMoviePlaybackStateStopped) {
        NSLog(@"MPMoviePlaybackStateStopped");
    } else if(playbackState == MPMoviePlaybackStatePlaying) {
        NSLog(@"MPMoviePlaybackStatePlaying");
    } else if(playbackState == MPMoviePlaybackStatePaused) {
        NSLog(@"MPMoviePlaybackStatePaused");
    } else if(playbackState == MPMoviePlaybackStateInterrupted) {
        NSLog(@"MPMoviePlaybackStateInterrupted");
    } else if(playbackState == MPMoviePlaybackStateSeekingForward) {
        NSLog(@"MPMoviePlaybackStateSeekingForward");
    } else if(playbackState == MPMoviePlaybackStateSeekingBackward) {
        NSLog(@"MPMoviePlaybackStateSeekingBackward");
    }
}
- (void) moviePlayerLoadStateChanged:(NSNotification*)notification {
    if ([moviePlayer loadState] != MPMovieLoadStateUnknown)
    {
        [[NSNotificationCenter  defaultCenter] removeObserver:self 
                        name:MPMoviePlayerLoadStateDidChangeNotification 
                           object:moviePlayer];
        [moviePlayer play];
        [self.activityIndicator stopAnimating]; 
        [moviePlayer setFullscreen:NO animated:NO];
    }
}

和在appdelegate 中

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{    
    // Override point for customization after application launch.
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];

    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    NSError *setCategoryError = nil;
    [audioSession setCategory:AVAudioSessionCategoryPlayback error:&setCategoryError];
    if (setCategoryError) {
    }
    NSError *activationError = nil;
    [audioSession setActive:YES error:&activationError];
    if (activationError) { 
    }

我可以捕捉错误，但如何使用appdelegate中的播放器？

Answer 1

尝试导入MPMoviePlayerController所在的类。在AppDelegate.h"import "YourClassNameWithThePlayer.h""中使用此代码。也许这会有所帮助。我也是新手，希望你考虑一下。