Getting black screen on using tab bar while searching using SearchController

Question

I have an app with a tab bar controller embedded in a navigation controller. The app has 2 tabs, the first one(search) has a search bar implemented using the UISearchControl

Answer 1

Looks like the view that your UISearchController is attached to gets removed from the view hierarchy. You can think of the UISearchController as being presented modally when you start searching, and the definesPresentationContext property indicates which UIViewController would be the one to present it (more on this).

One of the ways to fix this would be reconfiguring your storyboard so that each tab has its own UINavigationController (in case you need it for both):

Instead of (what I suspect you have now):

And if you want to dismiss UISearchController when the tab switches, add this override to the ViewController:

override func viewWillDisappear(animated: Bool) {
    super.viewWillDisappear(animated)
    searchController.active = false
}