user3411663 user3411663 - 1 year ago 277
iOS Question

Cannot set searchBar as firstResponder

I have a searchBar I'm setting in a tableviewcontroller. i've referenced this similar question UISearchBar cannot become first responder after UITableView did re-appear but am still unable to set it as first responder.
In .h file:

@property (strong, nonatomic) UISearchController *searchController;
@property (strong, nonatomic) IBOutlet UISearchBar *searchBar;

In view didload:

self.searchController = [[UISearchController alloc]initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
self.searchController.dimsBackgroundDuringPresentation = NO;
self.searchController.hidesNavigationBarDuringPresentation = NO;

self.searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 44.0);
self.tableView.tableHeaderView = self.searchController.searchBar;

And in viewDidAppear:

-(void)viewDidAppear:(BOOL)animated {
[self.searchController setActive:YES];
[self.searchController.searchBar becomeFirstResponder];
[super viewDidAppear:animated];

When I segue to the view the searchBar animates, but no keyboard appears.

Answer Source

I noticed this issue too. What seems to happen is the call to becomeFirstResponder is done when the searchController is still 'loading'. If you comment out becomeFirstResponder you notice that there is no difference. So we need a way to call becomeFirstResponder after the searchController is 'done'.

When I looked at various delegate methods I noticed there is a delegate method:

- (void)didPresentSearchController:(UISearchController *)searchController

This method is called right after the searchController has been presented. Then I make the call to becomeFirstResponder:

- (void)didPresentSearchController:(UISearchController *)searchController
    [searchController.searchBar becomeFirstResponder];

This fixes the problem. You will notice that when the searchController is loaded, the searchbar now has focus.

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