AVAudioSession setActive：中断结束后失败

Question

我添加了通知来听取其他人的打扰：

[[NSNotificationCenter defaultCenter]addObserver:self
                                     selector:@selector(audioInterruption:)
                                         name:AVAudioSessionInterruptionNotification
                                       object:nil];


- (void)audioInterruption:(NSNotification *)audioInterruptNotification{
NSLog(@"interrupted!");

   NSDictionary *interruptionDictionary = [audioInterruptNotification userInfo];
   NSNumber *interruptionType = (NSNumber *)[interruptionDictionary valueForKey:AVAudioSessionInterruptionTypeKey];

   if ([interruptionType intValue] == AVAudioSessionInterruptionTypeBegan) {
       NSLog(@"Interruption started");

   } else if ([interruptionType intValue] == AVAudioSessionInterruptionTypeEnded){
       NSLog(@"Interruption ended");
       BOOL success = [[AVAudioSession sharedInstance] setActive:YES withOptions:NO error:nil];
       if (!success) {
          NSLog(@"avaudio session set active failed");
       } 

   } else {
       NSLog(@"Something else happened");
   }
}

当发生中断时，通知很好但是没有 [[AVAudioSession sharedInstance] setActive:YES withOptions:NO error:nil];。那么为什么会发生这种情况，如何在中断后恢复播放（我使用AudioQueue播放或录制而不是AVAudioPlayer）？