The three20 library is an excellent iPhone library that was first released a couple of years ago and have mentioned some time ago on this website.
The library contains many utility classes allowing you to quickly add functionality commonly found in iPhone apps such as photo viewing, caching, creating your own launcher, and style sheets. Because of this extensive feature set the Three20 library has been used in many different applications. However one of the difficulties of using the Three20 project is that it can be difficult to find documentation. Because of that you can waste a lot of time looking through examples trying to figure things out.
I found a project known as Nimbus from Jeff Verkoeyen who has been very active within the Three20 community. The Nimbus project aims to implement the functionality of the Three20 library, but provide documentation first, and features second, and it is off to a great start.
The library is not a full Three20 replacement by any means yet, but ,any features have already been implemented. Already provided some excellent examples already included demonstrating how to create a launcher, a photo album, and how to download and cache images asynchronously and extensive documentation.
You can find the library here:
The documentation can be found here:
The library is off to a great start, and should be very useful if you are having difficulties getting the most out of Three20.
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