ios – 将关闭作为目标添加到UIButton

如果要将一个闭包作为目标添加到UIButton,则必须通过使用扩展名将函数添加到UIButton类

import UIKit

extension UIButton {
    private func actionHandleBlock(action:(() -> Void)? = nil) {
        struct __ {
            static var action :(() -> Void)?
        }
        if action != nil {
            __.action = action
        } else {
            __.action?()
        }
    }

    @objc private func triggerActionHandleBlock() {
        self.actionHandleBlock()
    }

    func actionHandle(controlEvents control :UIControlEvents,FOraction action:() -> Void) {
        self.actionHandleBlock(action)
        self.addTarget(self,action: "triggerActionHandleBlock",forControlEvents: control)
    }
}

和电话：

let button = UIButton()
 button.actionHandle(controlEvents: UIControlEvents.TouchUpInside,FOraction:{() -> Void in
     print("Touch")
 })