村长

IQAudioRecorderViewController *controller = [[IQAudioRecorderViewController alloc] init]; controller.delegate = self; controller.title = @"Recorder"; controller.bitRate=128000; controller.sampleRate=8000; controller.maximumRecordDuration = 60*10; controller.numberOfChannels=2; controller.allowCropping = YES; when I set bitRate,the recorder not work.