更改控制器时自动关闭键盘 Swift

Auto dismiss keyboard when change controller Swift

在这种情况下,我可以在完成编辑后点击任意位置时关闭键盘。但是,如果我不点击所有地方,我的键盘就会卡住并且无法自动隐藏。 示例:当我完成对文本字段的编辑时,我没有点击任何地方关闭键盘,但我点击了下一个按钮,键盘仍然显示在下一页中。 问题:当我瞄准另一个控制器时如何自动关闭键盘。

下面的代码是关闭键盘的正常点击。

let dismiss: UITapGestureRecognizer =  UITapGestureRecognizer(target: self, action: #selector(dismissKeyboard))
mainView.addGestureRecognizer(dismiss)
---------------------------
func dismissKeyboard() {
    //Causes the view (or one of its embedded text fields) to resign the first responder status.
    view.endEditing(true)
}

额外

这是我获取另一个控制器的代码

//Implement UITextFieldDelegate
extension LoginViewController: UITextFieldDelegate{

    func textFieldDidBeginEditing(_ textField: UITextField) {
        self.hideKeyboardWhenTappedAround()
        let secondViewController = self.storyboard?.instantiateViewController(withIdentifier: "EnterMpinViewController") as! EnterMpinViewController
        secondViewController.pinProtocol = self
        textField.resignFirstResponder()
        self.navigationController?.pushViewController(secondViewController, animated: true)
        //        self.performSegue(withIdentifier: "entermPINController", sender: self)
    }
}

因此,如果我点击 textField,我会跳转到另一个控制器以添加 pin。键盘卡在那里。

扩展代码:

//Implement viewWillDisappear
extension UIViewController {
    func hideKeyboardWhenTappedAround() {
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
        tap.cancelsTouchesInView = false
        view.addGestureRecognizer(tap)
    }

    func dismissKeyboard() {
        self.view.endEditing(true)
    }
}

您可以创建 BaseViewControler,它是 UIViewController 的子 class。然后你覆盖 viewWillDisappear 方法,并在那里隐藏键盘。 每个 view controller 应该是这个 BaseViewController.

的子 class

像下面的代码那样写:

override func viewDidDisappear(_ animated: Bool) {
    self.view.endEditing(true)
}