ios - 在 Swift 中子类化 UITextfield

Question

我目前正在我的 View Controller 中初始化相当多的属性，但感觉非常非常困惑。我一直在创建 UITextField，例如:

lazy var passwordTextField: UITextField = {
        let textField = UITextField()
        let paddingView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 30))
        textField.leftView = paddingView
        textField.leftViewMode = .always
        textField.placeholder = "Password"
        textField.isSecureTextEntry = true
        textField.autocorrectionType = .no
        textField.autocapitalizationType = UITextAutocapitalizationType.none
        textField.attributedPlaceholder = NSAttributedString(string: "Password", attributes: [NSAttributedString.Key.foregroundColor: UIColor.lightGray])
        textField.tintColor = UIColor.white
        textField.borderStyle = .none
        textField.layer.borderColor = UIColor.white.cgColor
        textField.layer.borderWidth = 0.7
        textField.delegate = self
        textField.textColor = UIColor.white
        return textField
    }()

每个 UIViewController 我有大约 5 个这样的。我想创建一个 UITextField 类，它基本上是一个输出自定义 UITextField 的工厂。我怎样才能做到这一点？

Answer 1

子类化任何项目都非常容易。只需做类似的事情

class MyTextField: UITextField {
    override init(frame: CGRect) {
        super.init(frame: frame)
        textFieldSetup()
    }

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

    private func textFieldSetup() {
        let paddingView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 30))
        leftView = paddingView
        leftViewMode = .always
        ...
        ...
        //Add the common properties here that you want replicated for every instance
        ...
        ...
        layer.borderColor = UIColor.white.cgColor
        layer.borderWidth = 0.7
        textColor = UIColor.white
    }
}

然后，您可以创建 MyTextField 实例而不是 UITextField

var passwordTextField: MyTextField!