iOS 正则表达式

 NSString *str=@"15264326";    
 //qq    
 NSString *regex=@"\\d{6,12}";
NSPredicate *pri=[NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];    
 if ([pri evaluateWithObject:str]) {
    NSLog(@"YES"); 
    }    else    { 
   NSLog(@"NO");    }
 }
 //邮箱
 + (BOOL) validateEmail:(NSString *)email
 { NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
  //手机号码验证
 + (BOOL) validateMobile:(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}$"; 
 //车牌号验证
 + (BOOL) validateCarNo:(NSString *)carNo { NSString *carRegex = @"^[\u4e00-\u9fa5]{1}[a-zA-Z]{1}[a-zA-Z_0-9]{4}[a-zA-Z_0-9_\u4e00-\u9fa5]$"; 
 //车型
 + (BOOL) validateCarType:(NSString *)CarType { NSString *CarTypeRegex = @"^[\u4E00-\u9FFF]+$";
  //用户名
 + (BOOL) validateUserName:(NSString *)name { NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$"; 
 //密码
 + (BOOL) validatePassword:(NSString *)passWord { NSString *passWordRegex = @"^[a-zA-Z0-9]{6,20}+$";
 //昵称
 + (BOOL) validateNickname:(NSString *)nickname { NSString *nicknameRegex = @"^[\u4e00-\u9fa5]{4,8}$"; 
 //身份证号
 + (BOOL) validateIdentityCard:  NSString *regex2 = @"^(\\d{14}|\\d{17})(\\d|[xX])$";