1
我有一个tableview，并在tableView中有多个单元格。
每个单元格都有一个AVAudioPlayer项目
而我面临一个问题。
我不知道如何管理AVAudioPlayer。
当我播放第一个AVAudioPlayer，然后播放第二个AVAudioPlayer时，声音会重叠。
如何在我的自定义单元格中停止第一个AVAudioPlayer并播放第二个AVAudioPlayer？
谢谢。
如何管理AVAudioPlayer isPlaying在每个tableviewCell中？
这是我的自定义单元格：
class TableViewCell: UITableViewCell {
@IBOutlet weak var myImageView: UIImageView!
@IBOutlet weak var myChatBubbleView: UIView!
@IBOutlet weak var myDateLabel: UILabel!
@IBOutlet weak var mySecondLabel: UILabel!
@IBOutlet weak var myRecordPlayerBtn: MenuButton!
private var timer:Timer?
private var elapsedTimeInSecond:Int = 0
var audioPlayer:AVAudioPlayer?
var message:ChatroomMessage?
var chatroomId:String = ""
var delegate:PlayRecordDelegate?
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
self.backgroundColor = defaultBackgroundColor
self.tintColor = defaultChatroomCheckButtonColor
myImageView.layer.masksToBounds = true
myImageView.layer.cornerRadius = defaultIconRadius
myChatBubbleView.backgroundColor = defaultChatGreenBubbleColor
myChatBubbleView.layer.cornerRadius = defaultButtonRadius
myDateLabel.textColor = defaultChatTimeColor
mySecondLabel.textColor = defaultChatTimeColor
mySecondLabel.isHidden = true
myRecordPlayerBtn.imageView?.animationDuration = 1
myRecordPlayerBtn.imageView?.animationImages = [
UIImage(named: "img_myRocordPlaying1")!,
UIImage(named: "img_myRocordPlaying2")!,
UIImage(named: "img_myRocordPlaying3")!
]
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func loadByMessage(_ message:ChatroomMessage, chatroomId:String) {
self.message = message
self.chatroomId = chatroomId
myRecordPlayerBtn.addTarget(self, action: #selector(recordPlay), for: .touchUpInside)
}
func resetRecordAnimation() {
self.myRecordPlayerBtn.imageView!.stopAnimating()
self.myRecordPlayerBtn.isSelected = false
}
func recordPlay(_ sender: UIButton) {
self.myRecordPlayerBtn.imageView?.startAnimating()
let documentsDirectoryURL = try! FileManager().url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true).appendingPathComponent("\(chatroomId)/Record/")
let fileName = message?.content.substring(from: 62)
let fileURL = documentsDirectoryURL.appendingPathComponent(fileName!)
if FileManager.default.fileExists(atPath: fileURL.path) {
let asset = AVURLAsset(url: URL(fileURLWithPath: fileURL.path), options: nil)
let audioDuration = asset.duration
let audioDurationSeconds = CMTimeGetSeconds(audioDuration)
self.elapsedTimeInSecond = Int(audioDurationSeconds)
if audioPlayer?.isPlaying == true {
audioPlayer?.stop()
DispatchQueue.main.async {
self.resetTimer(second: self.elapsedTimeInSecond)
self.startTimer()
}
}
updateTimeLabel()
startTimer()
audioPlayer = try? AVAudioPlayer(contentsOf: fileURL)
audioPlayer?.delegate = self
audioPlayer?.play()
}else{
//don't have file in local
let recordUrl = URL(string: (message?.content)!)
URLSession.shared.downloadTask(with: recordUrl!, completionHandler: { (location, response, error) in
guard
let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
let mimeType = response?.mimeType, mimeType.hasPrefix("audio"),
let location = location, error == nil
else { return }
do {
try FileManager.default.moveItem(at: location, to: fileURL)
let asset = AVURLAsset(url: URL(fileURLWithPath: fileURL.path), options: nil)
let audioDuration = asset.duration
let audioDurationSeconds = CMTimeGetSeconds(audioDuration)
self.elapsedTimeInSecond = Int(audioDurationSeconds)
DispatchQueue.main.async {
self.updateTimeLabel()
self.startTimer()
}
self.audioPlayer = try? AVAudioPlayer(contentsOf: fileURL)
self.audioPlayer?.delegate = self
self.audioPlayer?.play()
} catch {
print(error)
}
}).resume()
}
}
func startTimer() {
timer?.invalidate()
timer = Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true, block: { (timer) in
self.elapsedTimeInSecond -= 1
self.updateTimeLabel()
})
}
func resetTimer(second:Int) {
timer?.invalidate()
elapsedTimeInSecond = second
updateTimeLabel()
}
func updateTimeLabel() {
let seconds = elapsedTimeInSecond % 60
let minutes = (elapsedTimeInSecond/60) % 60
mySecondLabel.isHidden = false
mySecondLabel.text = String(format: "%02d:%02d", minutes,seconds)
}
}
extension TableViewCell:AVAudioPlayerDelegate {
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
let documentsDirectoryURL = try! FileManager().url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true).appendingPathComponent("\(Id)/Record/")
let fileName = message?.content.substring(from: 62)
let fileURL = documentsDirectoryURL.appendingPathComponent(fileName!)
if FileManager.default.fileExists(atPath: fileURL.path) {
let asset = AVURLAsset(url: URL(fileURLWithPath: fileURL.path), options: nil)
let audioDuration = asset.duration
let audioDurationSeconds = CMTimeGetSeconds(audioDuration)
DispatchQueue.main.async {
self.resetTimer(second: Int(audioDurationSeconds))
self.myRecordPlayerBtn.imageView!.stopAnimating()
self.myRecordPlayerBtn.imageView?.image = #imageLiteral(resourceName: "img_myRocordDefault")
}
}
}
}
但如何管理不同细胞的audioPlayer并使它停止？这是在一个单元格中工作，并重复相同的点击。当我点击其他单元格时，这不起作用。声音会重叠。 –
是否有任何特定的原因在tableViewCell类中做audioPlayer的东西？如果你想使用这种方法，在视图控制器中初始化一个audioPlayer并传递一个对tableviewcell的引用就会更好。另一种方法是将其从tableViewCell中完全取出并带入控制器。在那里你只有一个audioPlayer实例，你可以随心所欲地停下来玩，而不会产生声音重叠的问题。 –