UISearchController makes the controller black - ios

Question

I am using UISearchController in iOS 8 with the following intializaiton in viewDidLoad of a view controller embedded in a tab controller
_searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
_searchBar = _searchController.searchBar;
[_searchController.searchBar sizeToFit];
_searchController.searchBar.delegate = self;
_searchController.searchResultsUpdater = self;
_searchController.dimsBackgroundDuringPresentation = NO;
_searchController.hidesNavigationBarDuringPresentation = NO;
self.definesPresentationContext = NO;
_shopsTable.tableHeaderView = _searchController.searchBar;
I've implemented
- (void) updateSearchResultsForSearchController:(UISearchController *)searchController and (void)filterContentForSearchText:(NSString *)searchText
and the search works, the tableview gets updated properly, etc.
But!
If I switch tabs while the searchcontroller is active (just tapping the search bar or with some text) to a different tab, and then go back to teh search tab, I get a blank screen with only the search bar, like this
In this case, I search for things that start with lar, which did return results and displayed them correcly. But if I switch tabs, and return to the search tab I get a blank screen like this. The only way the controller returns to its original state is if I do _searchController.active = NO. But if the user wants to keep that search active, I can't just deactivate it.
I am sure I am missing something, but since there isn't much to do in UISeachController, I can't figure out what is causing this..

Answer 1

Try self.definesPresentationContext = YES; instead of NO. Here is how I setup my UISearchController, but I haven't done it this way in a UITabBarController before.
func setupSearchController() {
let resultsController = UIStoryboard(name: "ATPageTableViewController", bundle: nil).instantiateViewControllerWithIdentifier("ATPageTableSearchResultsViewController") as! ATPageTableSearchResultsViewController
searchController = UISearchController(searchResultsController: resultsController)
searchController.delegate = self
resultsController.delegate = self
resultsController.cellIdentifier = ATDataSetItemTableViewCellIdentifier;
resultsController.table = self.table!
searchController.searchBar.sizeToFit()
self.tableView.tableHeaderView = searchController.searchBar
searchController.searchResultsUpdater = self
searchController.searchBar.delegate = self
definesPresentationContext = true
}

Answer 2

Write the below code in viewDidLoad mehtod.
self.definesPresentationContext = true
searchController.searchResultsUpdater = self
searchController.searchBar.delegate = self
searchController.dimsBackgroundDuringPresentation = false
searchController.definesPresentationContext = true