iOS 支持同时播放和录音

//同时录音和播放

if(![[AVAudioSessionsharedInstance].categoryisEqualToString:AVAudioSessionCategoryPlayAndRecord] || !([AVAudioSessionsharedInstance].categoryOptions== (AVAudioSessionCategoryOptionDefaultToSpeaker|AVAudioSessionCategoryOptionMixWithOthers))) {

[[AVAudioSessionsharedInstance]setCategory:AVAudioSessionCategoryPlayAndRecordwithOptions:AVAudioSessionCategoryOptionDefaultToSpeaker|AVAudioSessionCategoryOptionMixWithOtherserror:nil];

}

[[AVAudioSessionsharedInstance]setActive:YESerror:nil];