UITapGestureRecognizer在Swift 3.0中不起作用

Question

這看起來似乎很簡單，但是我一直在梳頭一段時間，想知道為什么這不起作用。 我試圖在點擊時更改圖像，但似乎根本無法識別水龍頭。 我已經在情節提要和編程上啟用了用戶交互，所以有點迷失了。

override func viewDidLoad() {
    super.viewDidLoad()

    tL.isUserInteractionEnabled = true

    x = UIImage(named: "Cross.jpg")
    reset = UIImage(named: "white.png")

    //Tap Gesture ------------------------------------------------------------

    let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(Logic))
    gestureRecognizer.numberOfTapsRequired = 1

    tL.addGestureRecognizer(gestureRecognizer)
}

func Logic(_ sender: UITapGestureRecognizer) {
    let tappedView = sender.view as! UIImageView
    tappedView.image = x
    print("Image Tapped")
}

Answer 1

fun Logic需要1個參數，您應該在選擇器中提供此類參數。 從

let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(Logic))

至

let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(yourClassName.Logic(_ : )))