Change the UIButton title when click on UITableviewCells - ios

Question

I make simple player with VK Api. I want to do this.
When I clicked first track and then second change first button title "stop" to "play" automatically.
How to do it?
My play/stop button action.
func playAction(sender: UIButton!) {
if sender.currentTitle == "P" {
let track = dataOfTracks[sender.tag] as trackDoc
let url = NSURL(string: track.data.url)
player = AVPlayer(URL: url!)
player.play()
sender.setTitle("S", forState: UIControlState.Normal)
} else if sender.currentTitle == "S" {
sender.setTitle("P", forState: UIControlState.Normal)
player.pause()
}
}

Answer 1

EDIT CODE DETAILS:
don't reallocate every time the button. It must be another outlet of the SongsTableViewCell class (same as the label). And set the target/action from the Interface Builder (add #IBAction in front of "func cellSongClicked" and ctrl-drag from IB)
2.add the following property to your class:private var currentSong : Int?
3) method cellForRowAtIndexPath:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("SongTitleCell", forIndexPath: indexPath) as SongsTableViewCell
let songDic : NSDictionary = arrSongs.objectAtIndex(indexPath.row) as NSDictionary
cell.lblSongTitle.text = songDic.objectForKey("SongTitle") as? String
cell.btnPlayPause.tag = indexPath.row
var title : String
if let _currentSong = currentSong {
title = indexPath.row == _currentSong ? "Stop" : "Play"
} else {
title = "Play"
}
cell.btnPlayPause.setTitle(title, forState: UIControlState.Normal)
return cell
}
4) And the action:
#IBAction func cellSongClicked (sender : AnyObject ){
var remote = GetSongData()
remote.delegate = self
var btnCurrentPressed = sender as UIButton
//Play Selected Song
let songDic : NSDictionary = arrSongs.objectAtIndex(btnCurrentPressed.tag) as NSDictionary
var rowsToReload = [NSIndexPath]()
var stopCurrent = false
if let _currentSong = currentSong {
if btnCurrentPressed.tag == _currentSong {
stopCurrent = true
} else {
rowsToReload.append(NSIndexPath(forRow: _currentSong, inSection:0))
}
}
rowsToReload.append(NSIndexPath(forRow: btnCurrentPressed.tag, inSection:0))
currentSong = stopCurrent ? nil : btnCurrentPressed.tag
self.tableView.reloadRowsAtIndexPaths(rowsToReload, withRowAnimation: .None)
}

Answer 2

You don't have to change the title of the button every time. You could use something like this:
func viewDidLoad {
playButton.setTitle("Play", forState: UIControlState.Normal)
playButton.setTitle("Stop", forState: UIControlState.Selected)
}
Then in your callback method you just change the state of the button and the text will get updated too:
func playAction(sender: UIButton!) {
// Selected means the content is playing
if !sender.selected {
let track = dataOfTracks[sender.tag] as trackDoc
let url = NSURL(string: track.data.url)
player = AVPlayer(URL: url!)
player.play()
} else {
player.pause()
}
// update the state of the button
sender.selected = !sender.selected
}
I consider this to be a more clean solution since you are not comparing strings anymore to make your decision and you are actually using the binary state of the button to keep track of the current state of your content(which is also binary, either playing or not).
If you have more questions, I would be more than happy to help you further, just let me know.