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copied!<p>I've been wrestling with a similar local image corruption problem for a few months in my production app (using <code>UIImageJPEGRepresentation()</code> in my case), and in my case it had nothing to do with downloading the image - but the local storage and rendering.</p> <p>In my case, the actual user effect of the error was that the image would only partially render; the remainder of the image simply appear gray and corrupt. I am storing and reading from the disk using Core Data (but Core Data was shockingly not my problem).</p> <p><strong>MY FIX:</strong></p> <p>I was formerly using this convenience method:</p> <pre><code>UIImage *image = [UIImage imageWithContentsOfFile:imagePath]; </code></pre> <p>..but on the advice of <a href="https://stackoverflow.com/questions/5081297/ios-uiimagejpegrepresentation-error-not-a-jpeg-file-starts-with-0xff-0xd9">some other related posts here</a>, I switched to this combination of methods instead:</p> <pre><code>NSData *resultData = [NSData dataWithContentsOfFile:imagePath]; UIImage *image = [UIImage imageWithData:resultData]; </code></pre> <p>..and it SEEMS to have solved my problem!</p> <p><strong>MY THEORY</strong></p> <p>I'm guessing that <code>imageWithContentsOfFile:</code> is, for some reason, worse at handling some non-atomical edge case conditions vs. the pure base <code>NSData</code> calls, and it is for some reason allowing a 'read' to begin before the previous 'write' has completed.</p> <p>Hope this helps! Good luck.</p>

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