How can I debounce a method call?

Question

I\'m trying to use a UISearchView to query google places. In doing so, on text change calls for my UISearchBar, I\'m making a request to google pla

Answer 1

I used this good old Objective-C inspired method:

override func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
    // Debounce: wait until the user stops typing to send search requests      
    NSObject.cancelPreviousPerformRequests(withTarget: self) 
    perform(#selector(updateSearch(with:)), with: searchText, afterDelay: 0.5)
}

Note that the called method updateSearch must be marked @objc !

@objc private func updateSearch(with text: String) {
    // Do stuff here   
}

The big advantage of this method is that I can pass parameters (here: the search string). With most of Debouncers presented here, that is not the case ...