//用戶名+ (BOOL) validateUserName:(NSString *)name{ NSString *userNameRegex = @"^[A-Za-z0-9]{3,20}+$"; NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex]; BOOL B = [userNamePredicate evaluateWithObject:name]; return B;}//密碼+ (BOOL) validatePassword:(NSString *)passWord{ NSString *passWordRegex = @"^[a-zA-Z0-9]{6,20}+$"; NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",passWordRegex]; return [passWordPredicate evaluateWithObject:passWord];}//判斷手機號碼格式是否正確+ (BOOL)valiMobile:(NSString *)mobile{ mobile = [mobile stringByReplacingOccurrencesOfString:@" " withString:@""]; if (mobile.length != 11) {  return NO; }else{  /**   * 移動號段正則表達式   */  NSString *CM_NUM = @"^((13[4-9])|(147)|(15[0-2,7-9])|(178)|(18[2-4,7-8]))//d{8}|(1705)//d{7}$";  /**   * 聯通號段正則表達式   */  NSString *CU_NUM = @"^((13[0-2])|(145)|(15[5-6])|(176)|(18[5,6]))//d{8}|(1709)//d{7}$";  /**   * 電信號段正則表達式   */  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;  } }}/** * 驗證身份證號碼是否正確的方法 * * @param IDNumber 傳進身份證號碼字符串 * * @return 返回YES或NO表示該身份證號碼是否符合國家標準 */+ (BOOL)isCorrect:(NSString *)IDNumber{ NSMutableArray *IDArray = [NSMutableArray array]; // 遍歷身份證字符串,存入數組中 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];  } } // 系數數組 NSArray *coefficientArray = [NSArray arrayWithObjects:@"7", @"9", @"10", @"5", @"8", @"4", @"2", @"1", @"6", @"3", @"7", @"9", @"10", @"5", @"8", @"4", @"2", nil]; // 余數數組 NSArray *remainderArray = [NSArray arrayWithObjects:@"1", @"0", @"X", @"9", @"8", @"7", @"6", @"5", @"4", @"3", @"2", nil]; // 每一位身份證號碼和對應系數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;  } } // 這個和除以11的余數對應的數 NSString *str = remainderArray[(sum % 11)]; // 身份證號碼最后一位 NSString *string; if (IDNumber.length == 18) {  string = [IDNumber substringFromIndex:17]; }else{  string = [IDNumber substringFromIndex:14]; } // 如果這個數字和身份證最后一位相同,則符合國家標準,返回YES if ([str isEqualToString:string]) {  return YES; } else {  return NO; }}