正则表达式如何实现验证用户名、密码、手机号码、身份证功能

小编给大家分享一下正则表达式如何实现验证用户名、密码、手机号码、身份证功能，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

示例

//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 isMatch2 = [pred1 evaluateWithObject:mobile];  NSPredicate *pred2 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU_NUM];  BOOL isMatch3 = [pred2 evaluateWithObject:mobile];  NSPredicate *pred3 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT_NUM];  BOOL isMatch4 = [pred3 evaluateWithObject:mobile];  if (isMatch2 || isMatch3 || isMatch4) {   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; }}

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