在我的iPhone应用程序中，我需要启用扬声器和蓝牙。[[AVAudioSessionsharedInstance]setCategory:AVAudioSessionCategoryPlayAndRecorderror:nil];UInt32audioRouteOverride=kAudioSessionOverrideAudioRoute_Speaker;AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute,sizeof(audioRouteOverride),&audioRouteOverride);UI