To resolve the warning "Result of call to 'sink(receiveValue:) is unused`, create a variable of type "AnyCancellable?" and change the combine throttling method to: self.cancellable = NotificationCenter.default.publisher(for: UITextField.textDidChangeNotification, object: searchTextField) .debounce(for: .milliseconds(500), scheduler: RunLoop.main) .sink { _ in self.performLocalSearch() } Assigning that function to the cancellable variable causes the memory to be automatically deinitialized when the view is destroyed.

Brian, what is system requirement for the combine throttling? it doesn't perform the search and display the annotation after the i type in the search word in the textfield. I am running xcode 11.3 on MBP catalina 10.15.2.

Hey Brain as always, brilliant ! What would happen if the user doesn't have iOS 13+ ? would the UI throttling crash the app?

i get this error once im done with the new school method to throttling Failed local search: Error Domain=MKErrorDomain Code=4 "(null)" UserInfo={MKErrorGEOError=-8}

The notificationCenter listener of textField is not working on latest Xcode. I downloaded the demo project and cannot work. The sink code block has never been called. No idea what's going on.