如果在后台模式下播放时电话振铃

Question

我正在制作一个iphone应用程序(Live电台应用程序)。

我的应用程序支持后台模式。

但是，如果在后台模式下播放收音机应用程序时手机响起，我的应用程序会停止并出现错误。

MP AVAudioSessionDelegateMediaPlayerOnly end interruption. Interruptor <Phone> category <completed> resumable <0>,  _state = 6
MP endInterruptionFromInterruptor :: resuming playback 

所以，我修改了我的代码，但没有用。

我将添加我的代码。请告诉我我的缺点。谢谢。

AppDelegate.h

@interface AppDelegate : UIResponder <UIApplicationDelegate, AVAudioSessionDelegate>

@property (assign, nonatomic) UIBackgroundTaskIdentifier bgTask;  
... ... 

@end

AppDelegate.m

- (void)applicationDidEnterBackground:(UIApplication *)application
{
      bgTask = [application beginBackgroundTaskWithExpirationHandler:^{
        // Clean up any unfinished task business by marking where you.
        // stopped or ending the task outright.
        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    }];

    // Start the long-running task and return immediately.
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        // Do the work associated with the task, preferably in chunks.

        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    });
} 

- (void)applicationDidBecomeActive:(UIApplication *)application
{ 
    bgTask = [application beginBackgroundTaskWithExpirationHandler:^{        
        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid; 
    }];     
}

viewController.m

[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];  
moviePlayer = [[MPMoviePlayerController alloc] init];
[moviePlayer setContentURL:... m3u8];
[moviePlayer play];

Answer 1

您需要添加以下内容：

[UIApplication sharedApplication beginReceivingRemoteControlEvents]；