Question

我正在为该项目使用AVFoundation，下面是我的代码。每当按下暂停按钮并再次按下播放按钮时，就会从头开始播放录制的音频，而不是从上次播放的位置开始播放。除了暂停部分之外，整个代码都能正常工作，并且经过了很多优化，结果如下：

private var audioPlayer: AVAudioPlayer?
private var audioRecorder: AVAudioRecorder?

@objc func playButtonPressed(sender: UIButton) { //The buttons are made programmatically therefore I'm using addTarget later on.
    if let recorder = audioRecorder {
        if !recorder.isRecording {
            audioPlayer = try? AVAudioPlayer(contentsOf: recorder.url) //It plays the file saved in the expected url.
            audioPlayer?.delegate = self
            if let player = audioPlayer {
                if !player.isPlaying {
                    playButton.setImage(#imageLiteral(resourceName: "play"), for: .normal)
                    stopButton.setImage(#imageLiteral(resourceName: "stop2"), for: .normal)
                    recordButton.setImage(#imageLiteral(resourceName: "record"), for: .normal)
                    player.play()
                    startTimer()
                }
            }
        }
    }
}

@objc func pauseButtonPressed(sender: UIButton) { //The buttons are hidden and shown through different user usage so I don't need a lot of code in here.
    playButton.isHidden = false
    pauseButton.isHidden = true
    if let player = audioPlayer {    
        if player.isPlaying {
            audioPlayer?.pause() //This is the only issue in code, it literally stops the playing audio, not pausing it.
            pauseTimer()
        }
    }           
}

我想也需要看看播放和暂停计时器功能。所有委托和必需的协议已添加到该类中。欢迎进行任何必要的更改。

private var timer: Timer?

func startTimer() {
    timer = Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true, block: { (timer) in
        self.elapSetTimeInSecond += 1
        self.updateTimeLabel()

    })
}

func pauseTimer() {
    timer?.invalidate()
}

AVAudioPlayer在Swift中无法正确执行暂停命令

0 个答案: