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How does the Twitter iPhone App implement a custom tab bar? (idevrecipes.com)
19 points by boctor on Jan 4, 2011 | hide | past | favorite | 7 comments

I've been working on something[1] very similar for some of my own apps. It is available under the MIT license. What license are these recipes released under?

I decided not to mask the icons and opted for pre-masked PNGs because I couldn't match the style as well as I could in Photoshop. Yours is looking very good though. Maybe we should merge?

[1] https://github.com/briancollins/BCTabBarController

All the iDevRecipes code is now available under the MIT License: https://github.com/boctor/idev-recipes

Alternatively, one could apply the mask on the GPU by setting CALayer's mask property.

Do CALayer masks support gradient borders?

Not sure what you mean by "gradient borders"

Not being able to modify even the highlight tint colour of the UITabBar is a mini peeve of mine. To me it doesn't make much sense to force blue when a lot of the other UI elements have a tintColor property which works great.

I didn't have the time to do a custom one for my last project so we stayed with the standard blue in the end.

Edit: nice work though! Nice to see a thorough explanation of your thinking.

I wrote something similar for an app that used Titanium. All javascript, of course, with select-state images and a 1x42 pixel background. I'll see if the company I wrote it for will let me release it as a snippet.

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