swift - 对成员 "text"的模糊引用

Question

我有两个IBOulets:

@IBOutlet weak var usernameTextField: UITextField!

@IBOutlet weak var passwordTextField: UITextField!

我想检查他们的文本字段是否为空。但是，当我调用 text.isBlank 方法时，编译器显示错误 "Ambiguous reference to member 'text'"

   if ChatManager.shared.isConnected() {
        ChatManager.shared.disconnect()
        usernameTextField.isHidden = false
        passwordTextField.isHidden = false

    } else {


        guard usernameTextField.text.isBlank == false,
            passwordTextField.text.isBlank == false else {
            return
        }

我还注意到 UITextfield 有 text : String?或文本(UITextRange):字符串？

Answer 1

试试这个

else {
    guard usernameTextField.text.isEmpty == false,
    passwordTextField.text.isEmpty == false else {
    return
}