Swift：以编程方式添加 UITapGestureRecognizer 不起作用

Question

我有这个代码块，但它不像我想要的那样工作。 datum_view 看起来不错，但我点击它无济于事，它不起作用。

更新代码：

位置

var containerView: UIView!
var tov_datum = [String]()
var datum_view: UIView!

override func viewDidLoad() {
    super.viewDidLoad()
    containerView = UIView()

    let SCREEN_SIZE = UIScreen.mainScreen().bounds


    var Y: CGFloat = 0

    for index in tov_datum {
        datum_view = UIView(frame: CGRectMake(0, Y, SCREEN_SIZE.width, 80))
        let gradientView = GradientView(frame: datum_view.bounds)
        datum_view.insertSubview(gradientView, atIndex: 0)

        let tapGestureRecognizer = UITapGestureRecognizer(target:self, action:"klikk:")
        datum_view.userInteractionEnabled = true
        datum_view.addGestureRecognizer(tapGestureRecognizer)

        containerView.addSubview(datum_view)


        Y = Y + 80
    }
    let YY = tov_datum.count * 80
    NSLayoutConstraint(item: vetítésekView, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute:.NotAnAttribute, multiplier: 1.0, constant:CGFloat(YY)).active = true

    vetítésekView.addSubview(containerView)
}


func klikk(recognizer: UITapGestureRecognizer) {
    print("BOOOOYAAAA")
}

Answer 1

看起来没有在任何地方设置containerView的大小。 要快速查看这是否是问题所在，请使用您在其中创建datum_view的框架对其进行初始化：

let SCREEN_SIZE = UIScreen.mainScreen().bounds
containerView = UIView(frame: SCREEN_SIZE)

如果可行，那么确定您实际希望 containerView 的大小并设置适当的约束。

Answer 2

改变

func klikk(recognizer: UITapGestureRecognizer)

到

func klikk(_ recognizer: UITapGestureRecognizer)

Answer 3

改变这一行：

let tapGestureRecognizer = UITapGestureRecognizer(target:self, action:Selector("klikk:"))

到 ：

let tapGestureRecognizer = UITapGestureRecognizer(target:self, action:"klikk:")

Answer 4

您应该将 tapGestureRecognizer 声明为属性。