根据正则表达式，电子邮件验证错误

Question

//MARK: isValidEmailID
    func isValidEmail(testStr:String) -> Bool {
        print("validate emilId: \(testStr)")
        let emailRegEx = "^(?:(?:(?:(?: )*(?:(?:(?:\\t| )*\\r\\n)?(?:\\t| )+))+(?: )*)|(?: )+)?(?:(?:(?:[-A-Za-z0-9!#$%&’*+/=?^_'{|}~]+(?:\\.[-A-Za-z0-9!#$%&’*+/=?^_'{|}~]+)*)|(?:\"(?:(?:(?:(?: )*(?:(?:[!#-Z^-~]|\\[|\\])|(?:\\\\(?:\\t|[ -~]))))+(?: )*)|(?: )+)\"))(?:@)(?:(?:(?:[A-Za-z0-9](?:[-A-Za-z0-9]{0,61}[A-Za-z0-9])?)(?:\\.[A-Za-z0-9](?:[-A-Za-z0-9]{0,61}[A-Za-z0-9])?)*)|(?:\\[(?:(?:(?:(?:(?:[0-9]|(?:[1-9][0-9])|(?:1[0-9][0-9])|(?:2[0-4][0-9])|(?:25[0-5]))\\.){3}(?:[0-9]|(?:[1-9][0-9])|(?:1[0-9][0-9])|(?:2[0-4][0-9])|(?:25[0-5]))))|(?:(?:(?: )*[!-Z^-~])*(?: )*)|(?:[Vv][0-9A-Fa-f]+\\.[-A-Za-z0-9._~!$&'()*+,;=:]+))\\])))(?:(?:(?:(?: )*(?:(?:(?:\\t| )*\\r\\n)?(?:\\t| )+))+(?: )*)|(?: )+)?$"
        let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
        let result = emailTest.evaluateWithObject(testStr)
        return result
    }

func isValidEmailID(email: String) -> Bool {
        let regExPattern: String = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}"
        let emailValidator: NSPredicate = NSPredicate(format: "SELF MATCHES %@", regExPattern)
        let isValid: Bool = emailValidator.evaluateWithObject(email)
        return isValid
    }

所以，我发现“name@.com.com”是一个有效的电子邮件地址，还有更多类似这样的子域。所以现在我希望用户不要进入子域。是否有任何REGEX验证电子邮件地址只在一个域，如“[e-mail]”，而不是多个域或子域。

我也尝试了不同的google Regex并将其实现到项目中，但出现了同样的问题。
请帮我一下。
谢谢

Answer 1

不要推倒重来：

不是推倒重来：Swift中的电子邮件验证

基本上，您可以使用nsdatadetector来完成繁重的工作，使所有内容保持一致，并更新到它在macOS和iOS中的工作方式。不仅如此，您还可以避免regex头痛。

// Simplifying the example from the website a bit

import Foundation

func validate(_ text: String) -> Bool {
  let types = NSTextCheckingResult.CheckingType.link.rawValue
  guard
    let dataDetector = try? NSDataDetector(types: types),
    let match = dataDetector
      .matches(in: text, options: [], range: NSRangeFromString(text))
      .first,
    let absoluteString = match.url?.absoluteString
    else { return false }
  return absoluteString == "mailto:\(text)"
}

validate("[e-mail]")  // -> true
validate(" [e-mail]") // -> false