iOS Swift 按钮在 View 中没有响应

Question

我编写了一个类，其中显示的 View 具有 UITextView 和几个按钮。一切正常，除了按钮不响应水龙头。以下是我认为是我类(class)的相关代码:

class FullPrompt:UIViewController {
    var canceledPressedCallback:(()->()?)?=nil
    var okPressedCallback:((_ txt: String)->()?)? = nil
    var popupView = UIView()
    var field = UITextView()
    var parentView = UIView()

    func prompt(_ message:String,view: UIViewController,numberInput: Bool, callback: @escaping (_ txt: String)->()) {
        prompt(message, view: view, numberInput: numberInput, callback: callback,cancelCallback: nil,defaultText: "")
    }

    func prompt(_ prompt:String,view: UIViewController,numberInput: Bool, callback: @escaping (_ txt: String)->(), cancelCallback: (()->())?,defaultText: String) {
        canceledPressedCallback=cancelCallback
        okPressedCallback=callback

        let cancelButton=UIButton(frame: CGRect(x: 10, y: y, width: 70, height: 32))
        cancelButton.setTitle("Cancel", for: .normal)
        cancelButton.addTarget(self, action: #selector(cancelButtonPressed(_:)), for: .touchUpInside)
        popupView.addSubview(cancelButton)
        let okButton=UIButton(frame: CGRect(x: 210, y: y, width: 70, height: 32))
        okButton.setTitle("Ok", for: .normal)
        okButton.setTitleColor(UIColor.blue, for: .normal)
        okButton.addTarget(self, action: #selector(okButtonPressed(_:)), for: .touchUpInside)
        popupView.addSubview(okButton)
        view.view.addSubview(popupView)
    }

    func cancelButtonPressed(_ sender: UIButton ) {
        popupView.removeFromSuperview()
        if canceledPressedCallback != nil {
            canceledPressedCallback!()
        }
    }

    func okButtonPressed(_ sender: UIButton) {
        popupView.removeFromSuperview()
        okPressedCallback!(field.text)
    }
}

我做错了什么？

Answer 1

我明白了。我的错误是在我的类中添加了一个 View 属性 (popupView)。因为我的类是 UIViewController 的子类，所以我需要将我的 subview 添加到该类的 View 属性中，而不是创建另一个 View 。所以，基本上，无论我向 popupView 添加什么，我只是用 self.view 替换它。他们的按钮工作正常。