常用正则表达式

1.验证用户名和密码：（"^[a-zA-Z]\w{5,15}$"）正确格式："[A-Z][a-z]_[0-9]"组成,并且第一个字必须为字母6~16位；

2.验证电话号码：（"^(\d{3,4}-)\d{7,8}$"）正确格式：xxx/xxxx-xxxxxxx/xxxxxxxx；

3.验证手机号码："^1[3|4|5|8][0-9]\\d{8}$"；

4.验证身份证号（15位或18位数字）："\\d{17}[[0-9],0-9xX]"；

5.验证Email地址：("^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$")；

/*邮箱验证 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];  
}  
  
/*手机号码验证 MODIFIED BY HELENSONG*/  
-(BOOL) isValidateMobile:(NSString *)mobile  
{  
    //手机号以13， 15，18开头，八个 \d 数字字符  
    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];  
}  
  
/*车牌号验证 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];   
}