平行视窗Cell（并不局限）效果Demo
Use Git or checkout with SVN using the web URL.
Work fast with our official CLI. Learn more.
If nothing happens, download GitHub Desktop and try again.
If nothing happens, download Xcode and try again.
If nothing happens, download the GitHub extension for Visual Studio and try again.
计算方法支持背景图大于、等于、小于可视窗口范围的情况
demo运行效果如下
