我是使用正则表达式和NSPredicates的新手。我想下面的目标代码转换为迅速和失败与以下错误:Swift NSPredicate评估失败
'NSInvalidArgumentException', reason: 'Can't do regex matching on object SELF MATCHES "[email protected]([A-Za-z0-9-]+\.)+[A-Za-z]{2}[A-Za-z]*".'
目标C代码:
- (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代码
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)
}
此行发生异常:
return emailTest.evaluate(with: emailTest)
目标C代码工作正常,但在迅速应用程序崩溃。有人可以帮助我吗?
'评估... userEmail'与'评估... emailTest' – vadian
您将在这里找到答案HTTP ://stackoverflow.com/questions/25471114/how-to-validate-an-e-mail-address-in-swift干杯 –
@vadian感谢指出这个问题。我的错! –