基于iOS开发

[self addObserver:self forKeyPath:@"isRecording" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil]; [self addObserver:self forKeyPath:@"isPlaying" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil]; self.title = @"Speex"; self.levelMeter.progress = 0; self.consoleLabel.numberOfLines = 0; self.consoleLabel.text = @"A demo for recording and playing speex audio."; [self.recordButton addTarget:self action:@selector(recordButtonClicked:) forControlEvents:UIControlEventTouchUpInside]; [self.playButton addTarget:self action:@selector(playButtonClicked:) forControlEvents:UIControlEventTouchUpInside];