How to make audioplayer in swift? - swift

Question

I made audio player. I realize playlist and playing audio background functionality. I need to recognize which audio played in background.
Firts I create audio player object like:
var mp3Player:AVAudioPlayer?=AVAudioPlayer()
var firstLoad=true
var playingType_Index=0
var speedType_Index=0
When I click audio from list I put clicked audio to my selectedAudio
let audios=[
[
"image":UIImage.fontAwesomeIconWithName(.Headphones, textColor: UIColor(colorLiteralRed: 223/255, green: 156/255, blue: 104/255, alpha: 1.0), size: CGSizeMake(35, 35)),
"title": "Audio1",
"desc":"Erkemin",
"time":3,
"src":NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("audio1", ofType: "mp3")!)
]
]
var selectedAudio=[
"id":"",
"status":"",
"image":"",
"title": "",
"desc":"",
"time":0,
"src":""
]
func playAudio(sender:AnyObject){
firstLoad=false
backwardBtn.enabled=true
step_backward.enabled=true
play_pauseBtn.enabled=true
stopBtn.enabled=true
step_forward.enabled=true
forwardBtn.enabled=true
audioSlider.enabled=true
selectedAudio=audios[sender.tag]
selectedAudio["id"]=sender.tag
selectedAudio["status"]="true"
music()
tableView.reloadData()
}
I'm using selectedAUdio to recognize which audio now played. But when go to other view my audio continue playing but my selected audio being nil.
How can I do this?

Answer 1

I think you could have some problem like re-creation of this view: if you launch this view and playAudio(), selectAudio property is filled with your parameters but for something reason seems you re-make this view so your selectedAudio return to default values (empty strings).
If you need to stop your player with his method stop, you could do something like the code below:
func stopMp3Player() {
if let player = mp3Player {
if player.playing {
player.stop()
}
}
}
Warning: when you build this methods (you could also make pause) you should always check if your mp3Player is not nil to avoid crash.
About your play method I would do something like:
func playMp3Player(filename: String) {
let url = NSBundle.mainBundle().URLForResource(filename, withExtension: nil)
if (url == nil) {
print("Could not find file: \(filename)")
return
}
do { mp3Player = try AVAudioPlayer(contentsOfURL: url!, fileTypeHint: nil) }
catch let error as NSError { print(error.description) }
if let player = mp3Player {
player.volume = // set your volume here
player.numberOfLoops = 0 // set the repeating
player.prepareToPlay()
player.play()
}
}