Question

I’m currently trying to implement some kind of search system in a program of mine, and wanted to use an index, but I’m fairly new at Objective-C. The main idea is to have a ‘search’ command or text box and when I type a word, it’ll show me all the items that include that word. All these ‘items’ will be listed in a .txt file (hopefully) in alphabetical order. Any help is appreciated.

Answer 1

You need to read the .txt file into an NSSet or some other collection class and you can then search it using something like:

[words filterUsingPredicate:[NSPredicate predicateWithFormat:@"SELF contains[c] 'word'"]];

(See the Predicate Guide for details).