1. Yltagschooser用UICollectionView实现的兴趣标签选择器 (A interest tag selector implemented with the UICollectionView.)
3. Epub一步一步学习如何制作一个EPub电子书阅读器。How to make a EPub e-book reader step by step.
4. DebugWindow一个在真机上测试时方便查看输出日志的小工具。(A debug tool which helps you view the console logs on the device when you test you APP.)