Swift NSPredicate評估失敗

-1

我是使用正則表達式和NSPredicates的新手。我想下面的目標代碼轉換爲迅速和失敗與以下錯誤：Swift NSPredicate評估失敗

'NSInvalidArgumentException', reason: 'Can't do regex matching on object SELF MATCHES "[email protected]([A-Za-z0-9-]+\.)+[A-Za-z]{2}[A-Za-z]*".'

目標C代碼：

- (BOOL)validateEmailWithString:(NSString*)userEmail 
{ 
    BOOL stricterFilter = NO; 
    NSString *stricterFilterString = @"[A-Z0-9a-z\\._%+-][email protected]([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}"; 
    NSString *laxString = @"[email protected]([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*"; 
    NSString *emailRegex = stricterFilter ? stricterFilterString : laxString; 
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; 
    return [emailTest evaluateWithObject:userEmail]; 
}

等效Swift代碼

func validateEmail(withString userEmail: String) -> Bool { 
     let stricterFilter: Bool = false 
     let stricterFilterString: String = "[A-Z0-9a-z\\._%+-][email protected]([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}" 
     let laxString: String = "[email protected]([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*" 
     let emailRegex: String = stricterFilter ? stricterFilterString : laxString 
     let emailTest = NSPredicate(format: "SELF MATCHES %@", emailRegex) 
     return emailTest.evaluate(with: emailTest) 
    }

此行發生異常：

return emailTest.evaluate(with: emailTest)

目標C代碼工作正常，但在迅速應用程序崩潰。有人可以幫助我嗎？

來源

2017-02-08 Abhishek Harsha

'評估... userEmail'與'評估... emailTest' – vadian

您將在這裏找到答案HTTP ：//stackoverflow.com/questions/25471114/how-to-validate-an-e-mail-address-in-swift乾杯 –

@vadian感謝指出這個問題。我的錯！ –

請使用此行並對其進行測試

let emailRegEx = "[A-Z0-9a-z._%+-][email protected][A-Za-z0-9.-]+\\.[A-Za-z]{2,}" 

let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx) 
return emailTest.evaluateWithObject(userEmail)

來源

2017-02-08 12:44:30

試試這個

func validateEmailWithString(checkString : String) -> Bool { 

    let emailFormat = "[A-Z0-9a-z._%+-][email protected][A-Za-z0-9.-]+\\.[A-Za-z]{2,64}" 
    let emailPredicate = NSPredicate(format:"SELF MATCHES %@", emailFormat) 
    return emailPredicate.evaluate(with: checkString) 
}

來源

2017-02-08 12:53:11

Swift NSPredicate評估失敗

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