如何在表格视图中向UIButtons添加音频?

Question

使用 Swift，我一直在尝试弄清楚如何将单个音频文件添加到每个单元格中的每个 UIButton。我只能使一个音频文件工作，但该文件会附加到每个单元格中的每个按钮。这是我的代码：

import UIKit
import AVFoundation
public extension UITableView {
func indexPathForView(_ view: UIView) -> IndexPath? {
let origin = view.bounds.origin
let viewOrigin = self.convert(origin, from: view)
let indexPath = self.indexPathForRow(at: viewOrigin)
return indexPath
}
}
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, AVAudioPlayerDelegate {
var audioPlayer: AVAudioPlayer!
let elements = ["horse", "cat", "dog", "potato", "horse", "cat", "dog", "potato", "horse", "cat", "dog", "potato"]
let animalSounds = ["horse1", "cat1", "dog1", "potato1", "horse2", "cat2", "dog2", "potato2", "horse3", "cat3", "dog3", "potato3"]
@IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
tableView.delegate = self
tableView.dataSource = self
super.viewDidLoad()
}
public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return elements.count
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 100
}
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "customCell") as! UITableTableViewCell
cell.cellView.layer.cornerRadius = cell.cellView.frame.height / 2
cell.animalLabel.text = elements[indexPath.row]
cell.animalImage.image = UIImage(named: elements[indexPath.row])
cell.animalImage.layer.cornerRadius = cell.animalImage.frame.height / 2
cell.animalImage.clipsToBounds = true
cell.playAnimalSound.actions(forTarget: "playAnimalNoises", forControlEvent: UIControlEvents.allEditingEvents)
cell.playAnimalNoises.button
return cell
}
@IBAction func playAnimalNoises(_ sender: UIButton) {
//let indexPath = self.tableView.indexPathForView(sender) //worked as sender
//playSounds(soundFileName: animalSounds)
print("Button pressed @ ")
}
func playSounds(soundFileName: String){
let soundURL = Bundle.main.url(forResource: soundFileName, withExtension: "wav")
do {
try audioPlayer = AVAudioPlayer(contentsOf: soundURL!)
}
catch {
print("Somethings wrong...")
}
audioPlayer.play()
}
}
// button shown in each cell,

如果您需要我进一步解释，请告诉我。

Answer 1

首先，您需要将目标/操作正确添加到单元格的按钮。

删除：

cell.playAnimalSound.actions(forTarget: "playAnimalNoises", forControlEvent: UIControlEvents.allEditingEvents)
cell.playAnimalNoises.button

并添加：

cell.playAnimalSound.addTarget(self, action: #selector(playAnimalNoises), for: .touchUpInside)

然后更新playAnimalNoises：

@objc func playAnimalNoises(_ sender: UIButton) {
let point = self.tableView.convert(sender.bounds.origin, from: sender)
let indexPath = self.tableView.indexPathForRow(at: point)
playSounds(soundFileName: animalSounds[indexPath.row])
}