仿微信语音提醒-在后台或者杀死进程收到推送通知播放语音
收到推送消息，进行语音播报，使用系统的TTS:AVSpeechSynthesizer, 切到后台，或者杀死APP，会被系统打断，导致没有声音： AVSpeechSynthesizer Audio interruption notification: { AVAudioSessionInterruptionTypeKey = 1; AVAudioSessionInterruptionWasSuspendedKey = 1; } 使用下边的方法也无法解决， so使用科大讯飞的SDK--TTS，能解决这个问题。
https://stackoverflow.com/questions/45121294/avspeechsynthesizer-stopped-after-receive-audio-interruption-notification I made an app which can speech the word (TTS) in the background.
But the player will stoped after I receive this interruption notification.
AVSpeechSynthesizer Audio interruption notification: { AVAudioSessionInterruptionTypeKey = 1; AVAudioSessionInterruptionWasSuspendedKey = 1; } After I got the solution in here which shows in below, adding the notification and implement following code.
However, I found that AVAudioSessionInterruptionTypeEnded will never appear. Even I put the start function in AVAudioSessionInterruptionTypeBegan still doesn't work.
My question is, how to keep my AVSpeechSynthesizer work after receive the interrupt notification?
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleAudioSessionInterruption:) name:AVAudioSessionInterruptionNotification object:aSession];
-
(void)handleAudioSessionInterruption:(NSNotification*)notification {
NSNumber *interruptionType = [[notification userInfo] objectForKey:AVAudioSessionInterruptionTypeKey]; NSNumber *interruptionOption = [[notification userInfo] objectForKey:AVAudioSessionInterruptionOptionKey];
switch (interruptionType.unsignedIntegerValue) { case AVAudioSessionInterruptionTypeBegan:{ [self interruptHandler]; [self playObject]; } break; case AVAudioSessionInterruptionTypeEnded:{ if (interruptionOption.unsignedIntegerValue == AVAudioSessionInterruptionOptionShouldResume) { // Here you should continue playback. [self playObject]; } } break; default: break; } }
-
(void) interruptHandler { @synchronized (self) { dispatch_async(dispatch_get_main_queue(), ^{ NSError *error; AVAudioSession *aSession = [AVAudioSession sharedInstance]; [aSession setCategory:AVAudioSessionCategoryPlayback withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker error:&error]; [aSession setMode:AVAudioSessionModeDefault error:&error]; [aSession setActive: YES error: &error]; }); } }