ios - UITapGestureRecognizer 不适用于 Swift 3.0

Question

这可能看起来真的很简单，但我已经纠结了一段时间，想知道为什么这不起作用。我试图在点击时更改图像，但它似乎根本无法识别点击。我在 Storyboard上和以编程方式启用了用户交互，所以有点迷茫。

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 逻辑需要 1 个参数，您应该在选择器中提供。变化自

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

到

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