ios判斷郵箱,手機號碼，車牌號是否合法（正則表達）

/*郵箱驗證 MODIFIED BY HELENSONG*/-(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];}/*手機號碼驗證 MODIFIED BY HELENSONG*/-(BOOL) isValidateMobile:(NSString *)mobile{    //手機號以13， 15，18開頭，八個 \d 數字字元    NSString *phoneRegex = @"^((13[0-9])|(15[^4,\\D])|(18[0,0-9]))\\d{8}$";    NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];//    NSLog(@"phoneTest is %@",phoneTest);    return [phoneTest evaluateWithObject:mobile];}/*車牌號驗證 MODIFIED BY HELENSONG*/ BOOL validateCarNo(NSString* carNo) {     NSString *carRegex = @"^[A-Za-z]{1}[A-Za-z_0-9]{5}$";     NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",carRegex];     NSLog(@"carTest is %@",carTest);     return [carTest evaluateWithObject:carNo]; }