How to programmatically reload searchResultsTableView?

Question

Objective-C

The thing is, I have a tableView filled with data, I need to search for data that is not in this table. The search takes place using the RESTful API, i.e. via HTTP, but the problem is that when I enter the search text into the searchBar, it sends an HTTP request, and immediately reloads the searchResultsTableView without waiting for a response. For solution I have to programmatically reload searchResultsTableView when getting response from server, but I can't do that, view code

[[_searchController searchResultsTableView] reloadData];

does not work. How can the problem be solved?