在没有IBOutlet的情况下使用带有UIButton的IBActions

let button = UIButton(type: .system)
button.setTitle("点击我", for: .normal)
button.frame = CGRect(x: 100, y: 100, width: 100, height: 50)
button.addTarget(self, action: #selector(buttonClicked), for: .touchUpInside)
self.view.addSubview(button)

@objc func buttonClicked(sender: UIButton) {
    print("按钮被点击了")
}

let button = UIButton(type: .system)
button.setTitle("点击我", for: .normal)
button.frame = CGRect(x: 100, y: 100, width: 100, height: 50)
button.addTarget(self, action: #selector(buttonClicked), for: .touchUpInside)
self.view.addSubview(button)

button.handleControlEvent(.touchUpInside) { [weak self] sender in
    guard let self = self else { return }
    print("按钮被点击了")
}

extension UIControl {
    func handleControlEvent(_ event: UIControl.Event, closure: @escaping (UIControl) -> Void) {
        let sleeve = ClosureSleeve(closure: closure)
        addTarget(sleeve, action: #selector(ClosureSleeve.invoke), for: event)
        objc_setAssociatedObject(self, String(ObjectIdentifier(self).hashValue) + String(event.rawValue), sleeve, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN)
    }
    
    private class ClosureSleeve {
        let closure: (UIControl) -> Void
        
        init(closure: @escaping (UIControl) -> Void) {
            self.closure = closure
        }
        
        @objc func invoke(sender: UIControl) {
            closure(sender)
        }
    }
}