Shows how to display or print a multi-page PDF document and scroll an NSscrollview s contents by dragging.

iphone源代码，用重力加速度设计的一个游戏，需要在真机上运行，功能是倾斜手机，屏幕上的小球九滚动-iphone source code, a game designed with the acceleration of gravity, you need to be running on a real machine, the function is tilting the phone, the on-screen scroll ball nine

ImagePickerController可以自由滚动-ImagePickerController can freely scroll

实现无限循环滚动的UIScrollView，可以设置不同的滚动速度。自动滚动时，两列滚动视图的滚动速率是一样的。当用手指滚动某一列时，两列滚动视图的滚动速率是不同的 -Achieve infinite loop scrolling UIScrollView, you can set different scrolling speed. Automatic scroll, the two rows of rolling rate is the same view of the rolling.