加快侧边栏按钮拖动速度

- 移动系数从2改为3

pages/index/index.js

@@ -146,7 +146,7 @@ Page({
         isDragging: true
       });
       
-      let newTop = this.data.sidebarBtnTop + diffY * 2;
+      let newTop = this.data.sidebarBtnTop + diffY * 3;
       
       const systemInfo = wx.getSystemInfoSync();
       const screenHeight = systemInfo.screenHeight * 2;