Question

我想突出显示textField边框，而不是显示UIAlertController

这是我的代码，如果你不明白我的问题，请问我

@IBOutlet weak var emailTextField: UITextField!
@IBOutlet weak var passwordTextField: UITextField!

override func viewDidLoad() {
        super.viewDidLoad()

       emailTextField.delegate = self
        passwordTextField.delegate = self
}

if emailTextField.text != nil && passwordTextField.text != nil {


            activityIndicator.startAnimating()

            Auth.auth().signIn(withEmail: emailTextField.text!, password: passwordTextField.text!, completion: { (user, error) in
                if error != nil {
                    AlertController.showAlert(self, titel: "Error", message: "Email or Password incorrect")
                    self.activityIndicator.stopAnimating()
                    return
                }
                self.dismiss(animated: true, completion: nil)
                self.activityIndicator.stopAnimating()
            })

        }
    }

Answer 1

要更改UITextfield边框属性，您需要访问它的图层边框颜色和边框宽度属性：

data-id

这取决于你，但最好在emailTextField.layer.borderColor = UIColor.red.cgColor emailTextField.layer.borderWidth = 1.0中设置borderWidth，以便它在所有状态中保持一致，并且只调整回调中的borderColor。

在回调的成功部分中，您还需要恢复borderColor：

viewDidLoad

如果emailTextField.layer.borderColor = UIColor.black.cgColor不正确，可以将emailTextField替换为passwordTextField。但是从您的视图控制器看起来，您无法判断错误是来自电子邮件还是密码。最好通过使用Error枚举来传回它是什么类型的错误，以便您可以打开错误并调整emailTextField或passwordTextField边框颜色。

编辑：

Auth.auth().signIn(withEmail: emailTextField.text!, password: passwordTextField.text!, completion: { (user, error) in
            if error != nil {
                self.emailTextField.layer.borderColor = UIColor.red.cgColor
                self.passwordTextField.layer.borderColor = UIColor.red.cgColor
                self.activityIndicator.stopAnimating()
                return
            }
            self.dismiss(animated: true, completion: nil)
            self.activityIndicator.stopAnimating()
        })

Answer 2

class CustomTextField: UITextField {
lazy var bottomBorder: CALayer = {
    let border = CALayer();
    border.borderColor = UIColor.lightGray.cgColor;
    border.borderWidth = 1;
    return border
}()

override func awakeFromNib() {
    super.awakeFromNib()

    borderStyle = .none;
    layer.addSublayer(bottomBorder);
}

override func layoutSubviews() {
    super.layoutSubviews();

    let borderColor = isFirstResponder ? UIColor.yellow: UIColor.lightGray;
    bottomBorder.borderColor = borderColor.cgColor;
    bottomBorder.frame = CGRect(x: 0, y: layer.frame.size.height - 1, width: layer.frame.size.width, height: 1)
}

}

并使用make ur textfield class ur CustomTextField

然后像这样使用它

 @IBOutlet weak var emailTextField: CustomTextField!
 emailTextField.bottomBorder.borderColor = UIColor.red.cgColor;

Answer 3

//这里的代码可以正常工作

if self.emailTextField.text.isEmpty==true
{
self.emailTextField.layer.borderColor = UIColor.red.cgColor
self.emailTextField.layer.borderWidth = 1.0
}
else
{
 self.emailTextField.layer.borderWidth = 0.0
}
if self.passwordTextField.text.isEmpty==true
{
self.passwordTextField.layer.borderColor = UIColor.red.cgColor
self.passwordTextField.layer.borderWidth = 1.0
}
else
{
self.passwordTextField.layer.borderWidth = 0.0
}

当用户键入错误输入时，突出显示textField

3 个答案: