Question

我正在尝试验证文本并将其与UITextField键入事件合并。这是验证顺序：

let validation = textField.rx.text.map {ValidationService.validate($0)}

我测试了所有组合方法，但没有结果：

Observable.zip(textField.rx.controlEvent(.editingChanged), validation)

// Select
// No event

// Typing: "A"
// zip failed(message: "Field cannot be empty") () <- wrong

// Typing: "Aa"
// zip failed(message: "Field cannot be empty") () <- wrong

// Typing: "Aaa"
// zip failed(message: "Email is wrong") () <- correct

// UnSelect
// No event

Observable.combineLatest(textField.rx.controlEvent(.editingChanged), validation)

// Select
// No event

// Typing: "A"
// combineLatest combineLatest failed(message: "Email is wrong") () <- correct

// Typing: "Aa"
// combineLatest failed(message: "Field cannot be empty") () <- correct
// combineLatest failed(message: "Field cannot be empty") () <- correct

// UnSelect
// combineLatest failed(message: "Email is wrong") () <- wrong

validation
.withLatestFrom(textField.rx.controlEvent(.editingChanged))

// Select
// No event

// Typing: "A"
// No event

// Typing: "Aa"
// withLatestFrom () failed(message: "Email is wrong") <- correct

// UnSelect
// withLatestFrom () failed(message: "Email is wrong") <- wrong

您知道其他解决我问题的方法吗？

Answer 1

在您的viewDidLoad（）中尝试一下：

textField.rx.text.orEmpty
    .map { $0.isValidEmail }
    .subscribe(onNext: { isValid in
        print("email is \(isValid ? "" : "Not") Valid")
    })

以上使用此扩展名：

extension String {
    var isValidEmail: Bool {
        let emailRegex = "[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?"
        let predicate = NSPredicate(format: "SELF MATCHES %@", emailRegex)
        return  predicate.evaluate(with: self)
    }
}

如何使用RxSwift观察UITextField中的键入更改？

1 个答案: