Fix(首页):[#1544]首页做一个回到顶部的按钮，点击后页面往上回弹到首页顶部

pages/home/index.vue

@@ -232,6 +232,14 @@
 
     <Coupon-window :coupon-list="couponList" v-if="showCoupon" @checked="couponClose" @close="couponClose">
     </Coupon-window>
+    <u-back-top :scroll-top="scrollTop">
+      <image
+        :src="webUrl+'/icon/setTop.png'"
+        mode="scaleToFill"
+        style="width: 40px;height: 40px;"
+        @click="setTopHandle"
+      />
+    </u-back-top>
   </view>
 </template>
 
@@ -380,7 +388,8 @@ export default {
       contentFestival: {},
       countyFamous: {},
       seasonalFood: {},
-      pageKeyId: Object.freeze('home_index')
+      pageKeyId: Object.freeze('home_index'),
+      scrollTop: 0
     }
   },
   computed: mapGetters(["userInfo", 'isLogin']),
@@ -443,6 +452,9 @@ export default {
       url: '/pkg-video/views/lottery'
     })
   },
+  onPageScroll(e) {
+    this.scrollTop = e.scrollTop
+  },
   methods: {
     init() {
       let that = this;
@@ -719,6 +731,12 @@ export default {
       query.fields({size: true, scrollOffset: true}, (data) => {
         console.log(JSON.stringify(data))
       }).exec()
+    },
+    setTopHandle() {
+      uni.pageScrollTo({
+        scrollTop: 0,
+        duration: 200
+      })
     }
   }
 };