Swift-如何在按下不同UITableView单元格中的另一个播放按钮时自动停止当前播放音频？

Question

I am a swift beginner currently working on my first iOS app.

I have a TableViewController which has several cells and each cell contains a play button. When a few play buttons are pressed, a few different audios are played at the same time, but I would like to stop a currently playing audio when another playing play button is pressed.

Here are the sample codes I created.

Please give me an advice. Thank you so much!

ViewController.swift

import UIKit

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.delegate = self
    tableView.dataSource = self

    tableView.register(UINib(nibName: "TableViewCell", bundle: nil), forCellReuseIdentifier: "cell")

}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 3
}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    return 88
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
    return cell
}


}

TableViewCell.swift

import UIKit
import AVFoundation

class TableViewCell: UITableViewCell, AVAudioPlayerDelegate {

var audioPlayer: AVAudioPlayer = AVAudioPlayer()
var counter = 0

@IBAction func buttonTapped(_ sender: Any) {

    // Audio player setting
    do {

        audioPlayer = try AVAudioPlayer(contentsOf: URL.init(fileURLWithPath: Bundle.main.path(forResource: "sample", ofType: "mp3")!))
        audioPlayer.delegate = self
        audioPlayer.prepareToPlay()

    } catch {
        print(error)
    }

    if counter == 0 {
        audioPlayer.play()
        counter = 1
    } else {
        audioPlayer.stop()
        counter = 0
    }
}

}

Answer 1

One possible solution is to create _currentActivePlayer object variable. When you start playing audio then assign to it playing player. When other cell wants to play audio then check that variable, stop the player and assign new playing player.