实现各种各样的图形、动画效果.如视图的下翻，上翻，左转，右转，翻页-A wide variety of graphics, animation effects, such as the view down, turn, turn left, turn right, flip, etc.

该demo的表视图列表中实现了自绘各种小图形，实现各种动画效果-Table view a list of the demo is to achieve a variety of small self-painted graphics, to achieve a variety of animation effects