title: Which Search and Comparison Options should I use to search Chinese characters?
body: <pre><code>enum {
      NSCaseInsensitiveSearch = 1,
      NSLiteralSearch = 2,
      NSBackwardsSearch = 4,
      NSAnchoredSearch = 8,
      NSNumericSearch = 64,
      NSDiacriticInsensitiveSearch = 128,
      NSWidthInsensitiveSearch = 256,
      NSForcedOrderingSearch = 512,
      NSRegularExpressionSearch = 1024
  };
  
  - (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
  {
      [self.filteredListContent removeAllObjects];
      for (Notice *notice in allNoticeArray)
      {   
          if ([scope isEqualToString:@"标题"]) 
          {
              NSComparisonResult result = [notice.title compare:searchText
                                                        options:NSWidthInsensitiveSearch
                                                          range:NSMakeRange(0, [searchText length])];
              if (result == NSOrderedSame)
              {
                  [self.filteredListContent addObject:notice];
              }
          }
      }
  }
  </code></pre>
  
  <p>The <code>searchText</code> &amp; <code>notice.title</code> are all Chinese characters.</p>
  
  <p>So, which Search and Comparison Options should I use?</p>
  
  <p>Thank you in advance. Best wishes.</p>