how to show suggestion for UISearchBar search?

Question

I am making a demo Weather app, and inside this i am using UISearchBar so can user entry city name, but i don't know how to display suggestion for that.

For example, if user enters "lon" than there should be cities name suggesting start from "lon" like London, etc.

Answer 1

UISearchBar has its own delegation protocol UISearchBarDelegate, the method -

-(BOOL)searchBar:(UISearchBar *)searchBar
shouldChangeTextInRange:(NSRange)range
  replacementText:(NSString *)text

make possible while editing to do some extra operations, here you can put your NSPredicate to see if the inserted text has a city that BEGINSWITH or CONTAINS the entered text.