正则表达示

//利用正则表达式验证邮箱地址合法性

-(BOOL)isValidateEmail:(NSString *)email {

    

    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

    

    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];

    

    return [emailTest evaluateWithObject:email];

    

}