本项目是九宫格在iphone上的运用，有待完善。-This item is used on the direction pad in the iphone, to be improved.

非常好的一个项目。很值得你学习，值得研究，菜鸟吗都可以-Very good item. You are worth learning, worth studying, you can take a look at rookie

You use an AVPlayer object to implement controllers and user interfaces for single- or multiple-item playback. The multiple-item case supports advanced behaviors. AVPlayer works equally well with local and remote media files, providing you with

collaborative filtering code MathLabs for the recommended system, including item-based and user-based two cases. User-based and item-based collaborative filtering algorithm. Experimental data for MovieLens- a web-based movies recommender system with