UISearchController search bar width not changing

Question

Ran through a quick tutorial with search bars and figured that I could use searchBar.sizeToFit() to autosize the search bar, however the right end of the search bar still extends off of the screen.

class MainViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchResultsUpdating, UISearchBarDelegate {

     var searchController = UISearchController(searchResultsController: nil)
     override func viewDidLoad() {
         super.viewDidLoad()
         searchController.searchBar.delegate = self
         searchController.searchResultsUpdater = self
         searchController.dimsBackgroundDuringPresentation = false
         searchController.searchBar.sizeToFit()
         tableView.tableHeaderView = searchController.searchBar
         definesPresentationContext = true
    }}

I've tried to manually set the frame with something like searchController.searchBar.frame = CGRectMake(0, 0, 200, 200) but the width remained off of the screen. The search bar does not exist in the storyboard, however the tableView does.

Answer 1

Needed to set autolayout constraints for the tableView that the search bar was a part of. Setting these fixed the sizing issues.

Answer 2

If you're using Auto layout, then use leading and trailing edges instead of width constraints.