What ever happened to common courtesy?

Shaun, Aug 20

Pull-to-Refresh is powered by Facebook's three20 library, taken directly from our EGOTableViewPullRefresh library, without any attribution.

Updated 8:30PM — See below

Upon updating Facebook's iPhone app last night, the first thing I immediately noticed was Pull to Refresh, the awesome UI Element created by Loren Brichter for Tweetie 2. We fell in love with this element the second Tweetie 2 hit app store, so we re-created it and open sourced it for everyone to use.

We've seen Pull to Refresh used in a few apps before and always wondered whether or not it was the one we created, but never one as popular as Facebook. I immediately started looking to see if our code made it into their app, it would be awesome to see Facebook using something we wrote.

I was a little disappointed when I found out this element was actually apart of their open source iOS library three20. Still, I was curious as to how they did it. Was it similar to what we came up? Was it better? We were never fully happy with our implementation, but never had the time to spend on making it better.

Digging through their source code, I finally found the class: TTTableHeaderDragRefreshView. I started looking over to code to see how they accomplished it, and that's when I realized it: this was our class. You can see a diff on the two classes init methods below:

Note: For the purposes of the diff tool, I normalized the code blocks a bit, but you can compare for yourself by going here and here.

Facebook prefixed some variables, slapped their Three20 branding on it, restructured some code, but it was the same code we wrote. The same code we wrote, with zero mention of us.

Just like all of our open source code (and we've published a lot of it), our intent is always for it to be used to help developers and generally make apps/app store a better place for everyone. We were ecstatic that we might have made Facebook just a little bit better.

To find out that they took our code, re-released it as their own, and take credit for it though? That's not cool Facebook. Not cool at all. It also violates our license, which states they need to retain our copyright notice when republishing it.

Still, we're glad we could help made Facebook, three20, and all of the apps using pull to refresh in three20, better. It just would have been nice to get at least a hat tip from Facebook.

Update 8:30pm: Facebook reached out to us in the comments below and they've updated their headers to attribute the source code to us.

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