取消UISearchController会破坏分组的UITableViewController视觉效果

Question

I have a UITableViewController that shows countries group by the alphabet. I added a UISearchController in code:

let searchController = UISearchController(searchResultsController: nil)

searchController.searchBar.placeholder = ""
searchController.searchResultsUpdater = self
searchController.dimsBackgroundDuringPresentation = false
definesPresentationContext = true
tableView.tableHeaderView = searchController.searchBar

The problem is that when I dismiss the search bar, the UI visual kind of breaks, showing a strange space above the search bar:

Any ideas why this happens and how to solve it?

Answer 1

Try adding:

searchController.hidesNavigationBarDuringPresentation = false
searchController.searchBar.sizeToFit()

self.definesPresentationContext = true