ios - isHidden 设置为 false 后无法选择隐藏的 textField

Question

首先，我没有 Storyboard，一切都是程序化的。我有三个 TextFields，其中一个隐藏(isHidden = true)在登录按钮后面，登录按钮下方是注册按钮。如果您点击注册按钮，登录按钮会向下滑动到注册按钮下方，然后隐藏的文本字段会将其 isHidden 属性设置为 false。

我目前的问题是，当点击注册按钮时，登录按钮会向下移动并显示文本字段，但无法被选中，当我尝试选择它时，登录按钮会弹回到原来的位置。

我还让 View 在显示键盘时向上移动，然后再次向下移动，我认为这没有帮助。

文本字段:

class SplitterTextField: UITextField, UITextFieldDelegate {

    var accessID: String!

    required init(frame: CGRect, accessID: String) {
        super.init(frame: frame)
        self.accessID = accessID
        setup()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    private func setup() {
        delegate = self
        backgroundColor = Color.textFieldBackground
        accessibilityIdentifier = accessID
        textAlignment = .center
        returnKeyType = .done
        placeholder = NSLocalizedString("\(accessID!)PlaceHolder", comment: "")
    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        resignFirstResponder()
        return true
    }
}

移动按钮功能:

@objc private func registerButtonTapped() {
    if confirmPasswordTextField.isHidden {
        animateLoginButton()
    } else {
        registerNewUser()
    }
}


@objc private func loginButtonTapped() {
    if !confirmPasswordTextField.isHidden {
        animateLoginButton()
    } else {
        //segue to next vc
    }
}

private func animateLoginButton() {
    if confirmPasswordTextField.isHidden {
        moveLoginButtonDown()
    } else {
        moveLoginButtonUp()
    }
}

private func moveLoginButtonDown() {
    //Move loginButton down revealing confirmationPasswordTextView behind it
    UIView.animate(withDuration: 0.3, animations: {
        self.loginButton.frame.origin.y += Layout.loginButtonYMovement
        self.confirmPasswordTextField.isHidden = false
    })
}

private func moveLoginButtonUp() {
    //Move the loginButton up, when it has finished moving hide the confirmationPasswordTextView
    UIView.animate(withDuration: 0.3, animations: {
        self.loginButton.frame.origin.y -= Layout.loginButtonYMovement
    }, completion: { _ in
        self.confirmPasswordTextField.isHidden = true
    })
}

查看 Controller 键盘功能:

func setupKeyboard() {
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(sender:)), name: NSNotification.Name.UIKeyboardWillShow,object: nil)
        NotificationCenter.default.addObserver(self,selector: #selector(keyboardWillHide(sender:)),name: NSNotification.Name.UIKeyboardWillHide,object: nil)

}

@objc private func keyboardWillShow(sender: NSNotification) {
    self.view.frame.origin.y = Layout.welcomeScreenKeyboardMovement
}

@objc private func keyboardWillHide(sender: NSNotification) {
    self.view.frame.origin.y = 0
}

如有任何建议，我们将不胜感激。谢谢，让我知道是否需要更多上下文。所有 View 都使用约束固定，并且不会发生涉及约束的错误。

Answer 1

当按下注册按钮时添加这行代码。

self.view.bringSubview(toFront: confirmPasswordTextField) 

然后尝试选择该字段。正确设置框架按钮，使它们不会相互混淆。您可以打印按钮框架以便更好地理解。