When Loren Brichter introduced the idea of "pull to refresh" in Tweetie 2 a few years ago, it wasn't long before developers started to adopt this ingenious and intuitive concept. Even though Twitter now owns the patent on the "pull to refresh" concept, this hasn't stopped Apple from introducing the UIRefreshControl class in iOS 6. This new UIControl subclass makes it trivial to add a "pull to refr
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