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Re: NSOperation and lazy loading

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Re: NSOperation and lazy loading

Subject: Re: NSOperation and lazy loading
From: Kyle Sluder <email@hidden>
Date: Mon, 14 Sep 2009 21:28:46 -0700

Make your Person class KVO-compliant for the image property. If the object has not yet downloaded and cached it's image, have its -image method return a generic placeholder image (or nil) and start a background fetch. When the download is complete, have it call - setImage: on the Person for whom it was requested.

Now anyone who is a registered KVO observer of that object's image property will be notified when the download is complete.

--Kyle Sluder
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