Keeping a UIButton selected while audio is playing - ios

Question

I created the button with Image on MainStoryBoard. When I press that button it plays audio file.
I would like that button to stay highlighted during the time audio file is playing. When the audio is finished, I want the button to return to its default state.
I discovered that audioPlayerDidFinishPlaying(_:successfully:) is a right way, but can not solve this problem. Is it close to the proper way to do it? If not, how should I?
I'd appreciate any advice that will lead to finding the solution to this problem. Thanks.
let url = Bundle.main.bundleURL.appendingPathComponent("audio1.mp3")
override func viewDidLoad() {
super.viewDidLoad()
}
func play(url: URL) {
do {
try player = AVAudioPlayer(contentsOf:url)
player.play()
} catch {
print(error)
}
}
#IBAction func pushButton1(sender: UIButton) {
play(url: url)
}

Answer 1

On viewDidLoad, you can set default property when it is not playing (eg: I'm keeping background color as white) and while playing, make that button as selected(eg: I'm making it color Green)
Again in audioPlayerDidFinishPlaying when it stops playing audio, make it to default state (green to white again):
#IBOutlet weak var yourButton: UIButton!
let url = Bundle.main.bundleURL.appendingPathComponent("audio1.mp3")
override func viewDidLoad() {
super.viewDidLoad()
self.yourButton.backgroundColor = UIColor.white // default state of button
}
#IBAction func pushButton1(sender: UIButton) {
play(url: url)
}
func play(url: URL) {
do {
try player = AVAudioPlayer(contentsOf:url)
player.play()
self.yourButton.backgroundColor = UIColor.green // playing
}
catch {
print(error)
}
}
func audioPlayerDidFinishPlaying(player: AVAudioPlayer!, successfully flag: Bool) {
self.yourButton.backgroundColor = UIColor.white // back to default state
}