正则表达式验证用户名、密码、手机号码、身份证(推荐)

废话不多说了，下面给大家介绍使用正则表达式验证用户名、密码、手机号码、身份证的写法，需要的的朋友参考下吧

//用户名
+ (bool) validateusername:(nsstring *)name
{
 nsstring *usernameregex = @"^[a-za-z0-9]{3,20}+$";
 nspredicate *usernamepredicate = [nspredicate predicatewithformat:@"self matches %@",usernameregex];
 bool b = [usernamepredicate evaluatewithobject:name];
 return b;
}
//密码
+ (bool) validatepassword:(nsstring *)password
{
 nsstring *passwordregex = @"^[a-za-z0-9]{6,20}+$";
 nspredicate *passwordpredicate = [nspredicate predicatewithformat:@"self matches %@",passwordregex];
 return [passwordpredicate evaluatewithobject:password];
}
//判断手机号码格式是否正确
+ (bool)valimobile:(nsstring *)mobile
{
 mobile = [mobile stringbyreplacingoccurrencesofstring:@" " withstring:@""];
 if (mobile.length != 11)
 {
  return no;
 }else{
  /**
   * 移动号段正则表达式
   */
  nsstring *cm_num = @"^((13[4-9])|(147)|(15[0-2,7-9])|(178)|(18[2-4,7-8]))\\d{8}|(1705)\\d{7}$";
  /**
   * 联通号段正则表达式
   */
  nsstring *cu_num = @"^((13[0-2])|(145)|(15[5-6])|(176)|(18[5,6]))\\d{8}|(1709)\\d{7}$";
  /**
   * 电信号段正则表达式
   */
  nsstring *ct_num = @"^((133)|(153)|(177)|(18[0,1,9]))\\d{8}$";
  nspredicate *pred1 = [nspredicate predicatewithformat:@"self matches %@", cm_num];
  bool ismatch1 = [pred1 evaluatewithobject:mobile];
  nspredicate *pred2 = [nspredicate predicatewithformat:@"self matches %@", cu_num];
  bool ismatch2 = [pred2 evaluatewithobject:mobile];
  nspredicate *pred3 = [nspredicate predicatewithformat:@"self matches %@", ct_num];
  bool ismatch3 = [pred3 evaluatewithobject:mobile];
  if (ismatch1 || ismatch2 || ismatch3) {
   return yes;
  }else{
   return no;
  }
 }
}
/**
 * 验证身份证号码是否正确的方法
 *
 * @param idnumber 传进身份证号码字符串
 *
 * @return 返回yes或no表示该身份证号码是否符合国家标准
 */
+ (bool)iscorrect:(nsstring *)idnumber
{
 nsmutablearray *idarray = [nsmutablearray array];
 // 遍历身份证字符串,存入数组中
 if (idnumber.length == 18) {
  for (int i = 0; i < 18; i++) {
   nsrange range = nsmakerange(i, 1);
   nsstring *substring = [idnumber substringwithrange:range];
   [idarray addobject:substring];
  }
 }else{
  for (int i = 0; i < 15; i++) {
   nsrange range = nsmakerange(i, 1);
   nsstring *substring = [idnumber substringwithrange:range];
   [idarray addobject:substring];
  }
 }
 // 系数数组
 nsarray *coefficientarray = [nsarray arraywithobjects:@"7", @"9", @"10", @"5", @"8", @"4", @"2", @"1", @"6", @"3", @"7", @"9", @"10", @"5", @"8", @"4", @"2", nil];
 // 余数数组
 nsarray *remainderarray = [nsarray arraywithobjects:@"1", @"0", @"x", @"9", @"8", @"7", @"6", @"5", @"4", @"3", @"2", nil];
 // 每一位身份证号码和对应系数相乘之后相加所得的和
 int sum = 0;
 if (idnumber.length == 18) {
  for (int i = 0; i < 17; i++) {
   int coefficient = [coefficientarray[i] intvalue];
   int id = [idarray[i] intvalue];
   sum += coefficient * id;
  }
 }else{
  for (int i = 0; i < 14; i++) {
   int coefficient = [coefficientarray[i] intvalue];
   int id = [idarray[i] intvalue];
   sum += coefficient * id;
  }
 }
 // 这个和除以11的余数对应的数
 nsstring *str = remainderarray[(sum % 11)];
 // 身份证号码最后一位
 nsstring *string;
 if (idnumber.length == 18) {
  string = [idnumber substringfromindex:17];
 }else{
  string = [idnumber substringfromindex:14];
 }
 // 如果这个数字和身份证最后一位相同,则符合国家标准,返回yes
 if ([str isequaltostring:string]) {
  return yes;
 } else {
  return no;
 }
}

以上所述是小编给大家介绍的正则表达式验证用户名、密码、手机号码、身份证，希望对大家有所帮助