[Solved] How to convert ++ or — in Swift 3? [duplicate]

by


What you want IMHO

@IBAction func didTapPreviousButton(_ sender: UIButton) {
    currentTrack -= 1
    if currentTrack < 0 {
        currentTrack = (urlPlayerItems.count - 1) < 0 ? 0 : (urlPlayerItems.count - 1)
    }

    playTrack()
}

Correct replacing of POSTFIX as you have it (useless)

@IBAction func didTapPreviousButton(_ sender: UIButton) {
    if currentTrack < 0 {
        currentTrack -= 1
        currentTrack = (urlPlayerItems.count - 1) < 0 ? 0 : (urlPlayerItems.count - 1)
    }

    playTrack()
}

3

solved How to convert ++ or — in Swift 3? [duplicate]