How does the Twitter iPhone App animate the current tab bar indicator?(idevrecipes.com)

How does the Twitter iPhone App animate the current tab bar indicator?

http://idevrecipes.com/2010/12/17/twitter-app-tab-bar-animation/

2 comments

[deleted]16 lat temu

There has been much debate about making customizations like these that stray from the UI guidelines. I actually like subtle customizations like these, but some more orthodox folks feel that it's a crime.

In any case, it's nice to see someone reverse engineering some of them, as I've always wondered how a few of them worked.