iOS：獲取“UIButton”的“UIViewController”

Question

我需要在UIViewController的子 class 中UIButton的引用（對象）。 在這里，我嘗試了一些但失敗了。

class NavigationBarButton: UIButton {


    override func didMoveToSuperview() {
        super.didMoveToSuperview()

        var viewController: UIViewController? {
            var nextResponder: UIResponder? = self
            repeat {
                nextResponder = nextResponder?.next

                if let viewController = nextResponder as? UIViewController {
                    return viewController
                }

            } while nextResponder != nil

            return nil
        }

        guard let vcViewController = self.viewController else { print("NavigationBarButton view controller could not found"); return }

        print("handle further operations with ViewController of Button")

    }

}

class FirstVC: UIViewController {

    @IBOutlet weak var myButton: NavigationBarButton?


}

結果：
NavigationBarButton 視圖 controller 找不到

有沒有其他方法，在不更新 UIViewController 的情況下，我可以查看 controller 參考 ZA4F6654A77BFEC18184BC 的子 class 中的 controller 任何其他 UIButton 方法都可以在這里幫助我，在這里我可以查看按鈕的 controller。

類似的SO闕。 但對這個問題沒有用： Get current UIViewController from UIButton's class

Answer 1

這可能對你有用。

class NavigationBarButton: UIButton {


    override func didMoveToWindow() {
        super.didMoveToWindow()

        var viewController: UIViewController? {
            var nextResponder: UIResponder? = self
            repeat {
                nextResponder = nextResponder?.next

                if let viewController = nextResponder as? UIViewController {
                    return viewController
                }

            } while nextResponder != nil

            return nil
        }

        guard let vcViewController = self.viewController else { print("NavigationBarButton view controller could not found"); return }

        print("handle further operations with ViewController of Button")

    }

}

class FirstVC: UIViewController {

    @IBOutlet weak var myButton: NavigationBarButton?


}