基于iOS开发

[selfaddObserver:selfforKeyPath:@"isRecording"options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNewcontext:nil]; [selfaddObserver:selfforKeyPath:@"isPlaying"options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNewcontext:nil]; self.title=@"Speex";