单击另一个按钮swift 2.2更改声音按钮图像

Question

我正在创建一个Tableview里面的Tableviewcell，在单元格上有一个标签和声音按钮。 对于每个标签，按钮单击时会发出声音。 当我第一次点击btn1时，声音播放，按钮图像变为“暂停”，当我再次点击时，相同的按钮声音停止并且图像变为“播放”以这种方式完美地工作但是当我点击第一次时在一个按钮上的时间让我们假设btn1而不再点击它（停止声音）我点击btn2，btn1的声音停止，btn1和btn2的图像也发生变化。 我希望当我点击btn 2,3或4前一个声音应该停止时，前一个按钮的图像（表示除了当前的所有按钮）应该变为“播放”，当前点击的按钮应该变为“暂停”并且应该停止前一次点击的声音并且应该播放当前点击的声音。

import UIKit

class TableViewCell: UITableViewCell {

    @IBOutlet weak var titleLable: UILabel!
    @IBOutlet weak var sound: UIButton!
    override func awakeFromNib() {
        super.awakeFromNib()
    }

class ViewController: UIViewController , UITableViewDataSource , UITableViewDelegate , GADInterstitialDelegate {

    var countsNumberOfButtonClicks = 0
    var countsNumberOfInfoBtnClicks = 0
    var isFirstTime = false
    var player : AVAudioPlayer! = nil
    var titleAlert: String!

    @IBOutlet weak var myTableView: UITableView!
    var toggleState = 1


 func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell.

    {

    let myCell = self.myTableView.dequeueReusableCellWithIdentifier("myCell", forIndexPath: indexPath) as! TableViewCell

        myCell.titleLable.text = self.Duck[indexPath.row]

        myCell.sound.tag = indexPath.row
        myCell.sound.addTarget(self, action: #selector(self.playSound), forControlEvents: .TouchUpInside)
     return myCell
    }

   @IBAction func playSound(sender: UIButton) {

            if toggleState == 1 {
            let fullName: String = self.Duck[sender.tag]
            let fullNameArr = fullName.componentsSeparatedByString(" ")
            let path = NSBundle.mainBundle().pathForResource(fullNameArr[0], ofType:"wav", inDirectory: "sounds")
            let fileURL = NSURL(fileURLWithPath: path!)
            do {
                player = try AVAudioPlayer(contentsOfURL: fileURL)
                player.prepareToPlay()
            } catch {
                print("Problem in getting File")
              }   
            player.play()
            sender.setImage(UIImage(named: "pause.png"), forState: UIControlState.Normal)
            print("toggle state 1")
            toggleState = 2
        }
        else {
            player.pause()
            toggleState = 1
            sender.setImage(UIImage(named: "play.png"), forState: UIControlState.Normal)
            print("Toggle state else")
 }

模拟器结果

Answer 1

在你的类中，声明一个变量，

var currentlyPlaying : UIButton?

无论您在何处播放声音，都要存储在此变量中播放声音的按钮，并且每当此变量即将更改时，请重置上一个图像并存储新图像。

@IBAction func playSound(sender: UIButton) {

        if currentlyPlaying != sender || toggleState == 1 {

        //Set image in previous
        currentlyPlaying?.setImage(UIImage(named: "play.png")

        if player != nil{
            player.pause()
        }

        let fullName: String = self.Duck[sender.tag]
        let fullNameArr = fullName.componentsSeparatedByString(" ")
        let path = NSBundle.mainBundle().pathForResource(fullNameArr[0], ofType:"wav", inDirectory: "sounds")
        let fileURL = NSURL(fileURLWithPath: path!)
        do {
            player = try AVAudioPlayer(contentsOfURL: fileURL)
            player.prepareToPlay()
        } catch {
            print("Problem in getting File")
          }   
        player.play()


        sender.setImage(UIImage(named: "pause.png"), forState: UIControlState.Normal)

        //Store new
        currentlyPlaying = sender

        print("toggle state 1")

        if sender != currentlyPlaying{
            toggleState = 2
        }

        myTableView.reloadData()

    }
    else {
        player.pause()
        toggleState = 1
        sender.setImage(UIImage(named: "play.png"), forState: UIControlState.Normal)
        print("Toggle state else")
}