Question

My ViewController is a custom UIViewController <UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate, UISearchDisplayDelegate>. I have set up the UISearchBar to display a scope bar.

I instantiate the view controller once and then show the same view on demand via [self presentModalViewController:mySearchController fromView:self.view];

Now, when I configure the view controller to be displayed as a form sheet, the scope bar appears only the first time the view is shown. The next time the scope bar is not displayed.

Displaying the view as a page sheet works fine. However in this case I observe that the first time the scope bar is already in place, while thereafter it is animated into the search bar as soon as it becomes the first responder.

I fiddled around with the view and controller settings in the inspector without any success.

What is causing this behavior?

How can I make the scope bar appear in the form sheet the next time I am showing the view?

Is there a way to prevent the UISearchBar from going into a different state when its view is hidden/redisplayed?

Answer 1

Set the scope bar titles in search delegate for begin editing and make it nil when the search ends. And add the showScopeBar method right after this method. Try and check if that helps.

For eg:-

- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar { 
  [searchBar setScopeButtonTitles:[NSArray arrayWithObjects:@"Title1", @"Title2", nil]];
  [searchBar setShowsScopeBar:YES];
  //...
}

And in didEndEditing,

- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar {
  [searchBar setScopeButtonTitles:nil];
  [searchBar setShowsScopeBar:NO];
  //..
}

In addition to this, whenever you want to display the scopebar you can use the above lines to show and hide it.