ios - RxSwift : Error adding RX bind to UITextField: Value of type 'Binder' has no member 'debounce'

Question

我尝试在 UITextField 中添加延迟，但出现以下错误:

Property 'text' requires that 'UITextField' inherit from 'UILabel'
Value of type 'Binder<String?>' has no member 'debounce'

这是我的实现:

   func bind() {
        (myTextField.rx.text.debounce(0.5, scheduler: MainScheduler.instance) as AnyObject)
            .map {
                if  $0 == ""{
                    return "Type your name bellow"
                }else {
                    return "Hello, \($0 ?? "")."
                }
        }
        .bind(to: myLbl.rx.text)
        .disposed(by: disposeBag)
    }

你们中有人知道我为什么会收到此错误吗？

非常感谢您的帮助。

Answer 1

myTextField.rx.text是 ControlProperty<String?> ，有时长链可能会让 Swift 编译器难以区分您想要完成的任务。最好声明您的意图并将长链拆分为变量:

func bind() {
    // The way you wanted to do it
    let property: ControlProperty<String> = _textField.rx.text
        .orEmpty
        // Your map here

    property
        .debounce(.milliseconds(500), scheduler: MainScheduler.instance)
        .bind(to: _descriptionLabel.rx.text)
        .disposed(by: _disposeBag)

    // Driver is a bit better for UI
    let text: Driver<String> = _textField.rx.text
        .orEmpty
        // Insert your map here
        .asDriver()

    text
        .debounce(.milliseconds(500))
        .drive(_descriptionLabel.rx.text)
        .disposed(by: _disposeBag)
}

附言使用Driver将为您节省一些 UI 打字时间并使其更加清晰。