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How To Extend Objective-C Classes With Categories
submitted by ronwisley 8 months, 7 days ago

howtomakeiphoneapps.com — Here is how to extend the functionality of existing classes like NSString and NSURL using categories. This is a real clean way to extend and customize objects for your app without creating sub-classes. This makes categories a nice way to get some flexibilty and code reuse.

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