Why is this UISearchBar getting resized?

ios, ios7, iphone, uisearchbar, uitableview

Solution

The difference is in the search bar's value of `translatesAutoresizingMaskIntoConstraints`. It defaults to `NO` for the XIB-based view and `YES` for the code-based view. Apparently, the search controller assumes a value of YES and doesn't set up any explicit constraints when it transplants the search bar.

Setting the value to `YES` in code should fix it (verified locally).

UPDATE

As noted in the comments, even with `translatesAutoresizingMaskIntoConstraints = YES`, the controller does not restore the header view to it's original state on cancel. But there does seem to be a workaround. You can create an outlet to your header view and restore it yourself in `searchDisplayControllerDidEndSearch`. I did a crude proof-of-concept (and updated my sample project):

- (void)searchDisplayControllerDidEndSearch:(UISearchDisplayController *)controller
{
    self.tableView.tableHeaderView = self.headerView;
    [self.searchBar removeFromSuperview];
    self.searchBar.frame = CGRectMake(0, 20, 320, 44);
    [self.headerView addSubview:self.searchBar];
}

Problem

As shown below, my `UISearchBar` is getting resized when I tap on the search field. It animates nicely to cover the navigation bar, and then pop... it shrinks. The setup The `UISearchBar` is inside a vanilla `UIView` set as the `tableHeaderView`. I'm using a `UIView` (as opposed to setting the `UISearchBar` as the header) because I would like to put additional views in the header. The view is defined in a XIB file and the `UISearchBar` is anchored to all of its borders. The constraints don't seem to matter; if I remove them, the same problem happens. Experiments Examining the view hierarchy in Reveal tells me that the `UIView` has the right size and the `UISearchBar` has width 1 (?!) when this happens. As an experiment, I subclassed the `UISearchBar` and made `intrinsicContentSize` return `{320,44}`. With this the `UISearchBar` shows properly, but when I press Cancel I get the following exception: ``` *** Assertion failure in -[UITableView layoutSublayersOfLayer:], /SourceCache/UIKit_Sim/UIKit-2903.23/UIView.m:8540 *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Auto Layout still required after executing -layoutSubviews. UITableView's implementation of -layoutSubviews needs to call super.' ``` The workaround If I create everything by code, it just works. ``` _headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 44)]; UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 44)]; searchBar.delegate = self; [_headerView addSubview:searchBar]; _searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self]; _searchDisplayController.searchResultsDelegate = self; _searchDisplayController.searchResultsDataSource = self; _searchDisplayController.delegate = self; _tableView.tableViewHeader = _headerView; ``` What is going on here? I clearly won't use nibs to work with `UISearchBar` anymore, but I would like to understand what the heck happened anyway.

Original source