cps：省钱better-scroll优化

htmldev/cps/src/views/marketing/save/index.vue

@@ -82,18 +82,23 @@ export default {
   },
   methods: {
     _initScroll () {
-      this.shopsScroll = new BScroll(this.$refs.shopsWrapper, {
-        click: true,
-        pullDownRefresh: {
-          threshold: 50, // 顶部下拉的距离
-          stop: 0 // 回弹停留的距离
-        },
-        scrollbar: true
-      })
-
-      this.shopsScroll.on('pullingDown', () => {
-        this.onRefresh()
-      })
+      if (!this.shopsScroll) {
+        this.shopsScroll = new BScroll(this.$refs.shopsWrapper, {
+          click: true,
+          pullDownRefresh: {
+            threshold: 50, // 顶部下拉的距离
+            stop: 0 // 回弹停留的距离
+          },
+          scrollbar: true
+        })
+
+        this.shopsScroll.on('pullingDown', () => {
+          this.onRefresh()
+        })
+      } else {
+        this.shopsScroll.finishPullDown()
+        this.shopsScroll.refresh()
+      }
     },
     handleJump (shop) {
       top.location.href = shop.link_url