How to manage the AVAudioPlayer isPlaying in each tableviewCell? - ios

Question

I have a tableview and have multiple cells in tableView.
Each cell has an item of AVAudioPlayer
And I face a problem.
I don't know how to manage the AVAudioPlayer.
When I play first AVAudioPlayer, and then play second AVAudioPlayer, the sound will overlap.
How to stop first AVAudioPlayer in my customized cell, and play second AVAudioPlayer?
Thanks.
This is my customized cell:
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")
}
}
}
}

Answer 1

Probably first initialize to check if your player is playing
if audioPlayer != nil{
if audioPlayer?.isPlaying == true {
audioPlayer?.stop()
DispatchQueue.main.async {
self.resetTimer(second: self.elapsedTimeInSecond)
self.startTimer()
}
}
}

Answer 2

If you don't want to play two audio track at the same time, you should use a shared instance of AVAudioPlayer
It will be better for performances and you can define the instance as static var in your controller. It will be accessible in each cell.

Answer 3

I have developed a music palyer application, and I used a shared instance in the MusicPlayManager:
class MusicPlayManager{
var player : AVAudioPlayer?
static let sharedInstance = MusicPlayManager.init()
private override init() {
super.init()
}
// something else, such as palyNext, playPrevious methods
}
In your viewController,you can use MusicPlayManager.sharedInstance.player