实现在桌面浮动到顶端的窗口效果，该源码可以实现了一直浮动在顶端的层，同时也可以随手指拖动，拉至左边会影藏为文件形式等，感觉效果非常不错的，这是也是比较悬的浮动效果了。-In the desktop floating to the top of the window effect, the source can be realized has been floating in the top layer, but also can with drag your finger, pull to th