iOS开发验证判断语句之正则表达式小结

前言

大家都知道开发一直离不开一些常用验证格式，比如：邮箱，手机号等等，在开发过程中一般都会新建一个工具类，专门管理这些验证方式，简便开发过程。一般都采用正则表达式的形式来做判断，本文列举一些项目中非常实用的一些正则表达式的判断语句，以后开发起来直接复制粘贴就可以，这样大大节省了开发时间，下面不多说，直接上代码。

一、验证移动手机号：

+ (bool)ismobile:(nsstring*)mobile
{
  nsstring *regex = @"^1+[34578]+\d{9}";
  nspredicate *pred = [nspredicate predicatewithformat:@"self matches %@", regex];
  return [pred evaluatewithobject:mobile];
}

二、邮箱验证：

+ (bool)isemail:(nsstring*)email
{
  nsstring *regex = @"^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$";
  nspredicate *pred = [nspredicate predicatewithformat:@"self matches %@", regex];
  return [pred evaluatewithobject:email];
}

三、整形验证

+ (bool)ispureint:(nsstring*)string{
  nsscanner* scan = [nsscanner scannerwithstring:string];
  int val;
  return[scan scanint:&val] && [scan isatend];
}

四、浮点型验证

- (bool)ispurefloat:(nsstring*)string{
  nsscanner* scan = [nsscanner scannerwithstring:string];
  float val;
  return[scan scanfloat:&val] && [scan isatend];
}

五、中文验证

+ (bool)ischinese:(nsstring*)chinese
{
  nsstring *regex = @"^[\u4e00-\u9fa5]";
  nspredicate *pred = [nspredicate predicatewithformat:@"self matches %@", regex];
  return [pred evaluatewithobject: chinese];
}

六、网址url验证

+ (bool)isurl:(nsstring*)url
{
  nsstring *regex = @"[a-za-z]+://[^\s]*";
  nspredicate *pred = [nspredicate predicatewithformat:@"self matches %@", regex];
  return [pred evaluatewithobject: url];
}

七、身份证号验证(比较繁琐)

+ (bool)verifyidcardnumber:(nsstring *)idcardnumber 
{ 
idcardnumber = [idcardnumber stringbytrimmingcharactersinset:[nscharacterset whitespaceandnewlinecharacterset]]; 
if ([idcardnumber length] != 18) 
{ 
return no; 
} 
nsstring *mmdd = @”(((0[13578]|1[02])(0[1-9]|[12][0-9]|3[01]))|((0[469]|11)(0[1-9]|[12][0-9]|30))|(02(0[1-9]|[1][0-9]|2[0-8])))”; 
nsstring *leapmmdd = @”0229”; 
nsstring *year = @”(19|20)[0-9]{2}”; 
nsstring *leapyear = @”(19|20)(0[48]|[2468][048]|[13579][26])”; 
nsstring *yearmmdd = [nsstring stringwithformat:@”%@%@”, year, mmdd]; 
nsstring *leapyearmmdd = [nsstring stringwithformat:@”%@%@”, leapyear, leapmmdd]; 
nsstring *yyyymmdd = [nsstring stringwithformat:@”((%@)|(%@)|(%@))”, yearmmdd, leapyearmmdd, @”20000229”]; 
nsstring *area = @”(1[1-5]|2[1-3]|3[1-7]|4[1-6]|5[0-4]|6[1-5]|82|[7-9]1)[0-9]{4}”; 
nsstring *regex = [nsstring stringwithformat:@”%@%@%@”, area, yyyymmdd , @”[0-9]{3}[0-9xx]”];

nspredicate *regextest = [nspredicate predicatewithformat:@"self matches %@", regex];
if (![regextest evaluatewithobject:idcardnumber])
{
  return no;
}
int summary = ([idcardnumber substringwithrange:nsmakerange(0,1)].intvalue + [idcardnumber substringwithrange:nsmakerange(10,1)].intvalue) *7
+ ([idcardnumber substringwithrange:nsmakerange(1,1)].intvalue + [idcardnumber substringwithrange:nsmakerange(11,1)].intvalue) *9
+ ([idcardnumber substringwithrange:nsmakerange(2,1)].intvalue + [idcardnumber substringwithrange:nsmakerange(12,1)].intvalue) *10
+ ([idcardnumber substringwithrange:nsmakerange(3,1)].intvalue + [idcardnumber substringwithrange:nsmakerange(13,1)].intvalue) *5
+ ([idcardnumber substringwithrange:nsmakerange(4,1)].intvalue + [idcardnumber substringwithrange:nsmakerange(14,1)].intvalue) *8
+ ([idcardnumber substringwithrange:nsmakerange(5,1)].intvalue + [idcardnumber substringwithrange:nsmakerange(15,1)].intvalue) *4
+ ([idcardnumber substringwithrange:nsmakerange(6,1)].intvalue + [idcardnumber substringwithrange:nsmakerange(16,1)].intvalue) *2
+ [idcardnumber substringwithrange:nsmakerange(7,1)].intvalue *1 + [idcardnumber substringwithrange:nsmakerange(8,1)].intvalue *6
+ [idcardnumber substringwithrange:nsmakerange(9,1)].intvalue *3;
nsinteger remainder = summary % 11;
nsstring *checkbit = @"";
nsstring *checkstring = @"10x98765432";
checkbit = [checkstring substringwithrange:nsmakerange(remainder,1)];// 判断校验位
return [checkbit isequaltostring:[[idcardnumber substringwithrange:nsmakerange(17,1)] uppercasestring]];
}

八、一般用户名的验证

+ (bool) isusername:(nsstring *)name
{
  nsstring *usernameregex = @"^[a-za-z0-9]{6,20}+$";
  nspredicate *usernamepredicate = [nspredicate predicatewithformat:@"self matches %@",usernameregex]；  
  return [usernamepredicate evaluatewithobject:name];
}

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流。