search.m

- (void)searchFor:(NSString*)query
{
   // Cancel any existing search queries
   if (self.searchQuery)
   {
      [self.searchQuery cancel];
      self.searchQuery = nil;
      [self.searchResults removeAllObjects];
      [self updateSearchResults];
   }

   // Create the query
   NSString* queryString = [NSString stringWithFormat:@"displayName == '*%@*'c", query];
   self.searchQuery = [[CSSearchQuery alloc] initWithQueryString:queryString
                                                      attributes:@[@"displayName"]];
   
   __weak typeof(self) weakSelf = self;

   // When items are found, add them to the search results
   self.searchQuery.foundItemsHandler = ^(NSArray<CSSearchableItem *> *items) {
      for (CSSearchableItem* item in items)
      {
         ALAirport* airport = [weakSelf.airportController
                               airportWithIdentifier:[item uniqueIdentifier]];
         
         [weakSelf.searchResults addObject:airport];
         [weakSelf updateSearchResults];
      }
   };

   // When complete, update the search results
   self.searchQuery.completionHandler = ^(NSError* error) {
      if (error)
      {
         NSLog(@"%@", error);
      }
      else
      {
         [weakSelf updateSearchResults];
      }
   };

   // Start the search. Handle results and errors using the handler blocks
   [self.searchQuery start];
}