ios – 将静态方法设置为Swift中UITapGestureRecognizer的操作

我正在以静态方法编程创建一个UIView,并希望添加UITapGestureRecognizer,它将在我的Helper类中调用另一个静态方法.

Helper.swift

static func showLoadingPopUp(frame: CGRect) -> UIView {
  let transView = UIView.init(frame: frame!)       
  let tapGesture = UITapGestureRecognizer(target: self, action: "transViewTapped:")
  transView.addGestureRecognizer(tapGesture)
  return transView
}

static func transViewTapped(gesture: UITapGestureRecognizer) {
  print("Oh Tapped!!!")
}

但它最终会出现以下消息,可能是因为我的方法的静态特性.另外Helper.swift是简单的swift类(不是UIView或UIViewController)

错误:

Unrecognized selector +[JaClassified.Helper transViewTapped:]

最佳答案 如果你的类不是NSObject的后代,你可能需要将静态函数桥接到Objective-C(因为旧式的Objective-C选择器适用于NSObjects).

因此,在您的情况下,您可以将Helper类声明为

class Helper: NSObject {
    ...
}

或者,您可以通过前缀@objc将transViewTapped:桥接到Objective-C

@objc static func transViewTapped(gesture: UITapGestureRecognizer) {
    ...
}

希望能帮助到你.

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