一个自己做的cprogressbar的类，你可以从此类派生以改变进度条的背景色，上面加文字，以及前端有一个毛毛虫不断前进的动画效应。-have done a cprogressbar the category, you can derive from such changes in the progress of the background color, increases above text, and with a front-end Caterpillar continuous adva