Results 2 issues of lujun

loading 过程中,当不停的点击LodingBtn,scale动画会不停的演示。demo中,点击了'增加进度'后,在loading没有结束前再次点击LodingBtn,导致最终的‘完成’动画不会出现。只是一个小的bug。

#### There is a bug will cause performance lag, the flow like this: 1. When `Scroller.UpdatePosition` method is called, the custom `onValueChanged` action been invoked and the scrollbar value will...