暂停的音频开始在applicationWillEnterForeground上自动播放:

Question

当applicationDidEnterBackground:触发器,我暂停其使用播放音频AVAudioPlayer:

[self.avPlayer pause];

现在,当applicationWillEnterForeground:触发时,音频开始自动播放!由于我没有启动音频,因此用户界面未更新,并且显示音频仍处于暂停状态.

这是怎么回事？这种情况发生在iOS 6.x,iPad 2上.这个问题不能在运行iOS 5.x的旧iPad上重现.

这是我设置的方式AVAudioSession:

// Setup the audio session
BOOL succeeded = NO;
NSError *sessionError = nil;
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setDelegate:self];

if ([session respondsToSelector:@selector(setPreferredSampleRate:error:)]) {
    succeeded = [session setPreferredSampleRate:128000.0f error:&sessionError];

} else {
    succeeded = [session setPreferredHardwareSampleRate:128000.0f error:&sessionError];
}

succeeded = [session setCategory:AVAudioSessionCategorySoloAmbient error:&sessionError];
succeeded = [session setActive:YES error:&sessionError];

Answer 1

In one of my recent app, I found a similar issue where audio playback pauses automatically and resumes after you are interrupted by a call and GUI is not refreshing in my app. I have fixed the issue by using the following method:

Register this in the class where you handle player code

[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

And use AVAudioSession's audioPlayerEndInterruption delegate method to get control after the application was resumed. In this function you can resume the playback and update UI accordingly.

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withOptions:(NSUInteger)flags

希望这可以帮助。