三种圆形进度条效果

源码Download-Indicator，实现三种圆形的进度条。一种是圆环型，一种是实心圆形，一种是圆环加实心圆。进度条的动画效果也有两种，一种是连续前进，一种是分段前进，具体看效果图。可用作下载进度指示器。 This is a iOS Download Indicator for iOS 7, which can be used for showing the download % of the files being downloaded. It contains 3 types of indicators (closed, filled and mixed). The classes are made flexible such that Change the stroke color. Changefill color. Custom set the inner and the outer radius, the animation duration. Here a image in the gif format, but in real the indicator animates beautifully from one state to another.