UISearchDiplayController: show all results without entering text?

I have 开发者_JS百科a UISearchDisplayController that is being used to display a long list of options for the user to pick. I filter the list using the search bar supplied by the controller.

It all works ok, apart from I can't get the results table to display except by entering text into the search bar. I want to have the table show all the results I have, even when there is no text in the search bar. At present, when there is no text I just have a dimmed underlying view.

Is this possible please? Or should I not bother with the UISearchDisplayController at all, and just have a searchbar in another tableview that I display, and then just pop it off the stack?

To display search results instantly with empty searchBar upon keyboard appearance, add the following code to ViewController:

-(void)searchDisplayControllerDidBeginSearch:(UISearchDisplayController *)controller {
  [controller.searchBar.delegate searchBar:controller.searchBar textDidChange:@" "];
}

To keep table showing results when users enter enters some text and then clears searchBox, add:

-(void)searchDisplayController:(UISearchDisplayController *)controller didHideSearchResultsTableView:(UITableView *)tableView {
  [controller.searchBar.delegate searchBar:controller.searchBar textDidChange:@" "];    
}

Don't forget to return YES in searchDisplayController:shouldReloadTableForSearchString:

Typically you would want to start by loading all of your content into a single array from which you would display a table view as "normal".

Once this is working, create a second array containing the search results from within

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString

Then, within the table view's delegate/data source methods, decide which context you are in by checking

if (_tableView == self.searchDisplayController.searchResultsTableView)