fix: 定位问题修复

app/web/page/activity/component/PageBottomTip/index.vue

 <template>
-  <div class="Pb-container">
+  <div class="Pb-container" :style="bgColor">
     <span class="Pb-text" :style="style">{{ txt }}</span>
   </div>
 </template>
@@ -16,6 +16,12 @@ export default {
       return {
         color: this.pageData.props.pageBottomColor
       };
+    },
+    // TODO 这样不太好
+    bgColor() {
+      return {
+        'backgroundColor': this.pageData.commonStyle.backgroundColor
+      };
     }
   }
 }
@@ -24,6 +30,7 @@ export default {
   .Pb {
     &-container {
       height: 60px;
+      width: 100%;
       text-align: center;
       display: flex;
       align-items: center;

app/web/page/activity/view/activity/index.ts

@@ -24,26 +24,23 @@ export default class Activity extends Mixins(TransformStyleMixin, SaMixin) {
     h: 60,
     i: 'page-bottom-top'
   };
-  layout: object = [];
   isLayoutComReady = false;
   showBackTop = false;
   targetEle: HTMLElement | null = null;
   loading: boolean = true;
   modfiTabsStyleDebounce = debounce(this.modfiTabsStyle, 300);
 
+  get layout() {
+    return this.pageData && this.pageData.elements.map(v => v.point) || [];
+  }
+
   get backTopList() {
-    return this.pageData && this.pageData.props.showShopCart ? [
-      {
-        icon: 'shopping-cart-o',
-        url: 'xyqb://shoppingCartTab'
-      }
-    ] : [];
+    return this.pageData && this.pageData.props.showShopCart ? this.pageData.props.backTopAttachInfo : [];
   }
 
-  @Watch('pageData')
+  @Watch('layout')
   onLayoutChange(val) {
-    const layout = this.pageData && this.pageData.elements.map(v => v.point) || [];
-    const lastGridItemPoint = layout[layout.length - 1];
+    const lastGridItemPoint = val[val.length - 1];
     if (lastGridItemPoint.w) {
       this.bottomInfo = {
         x: 0,
@@ -55,8 +52,6 @@ export default class Activity extends Mixins(TransformStyleMixin, SaMixin) {
       if (lastGridItemPoint.w > this.bottomInfo.w) { this.bottomInfo.w = lastGridItemPoint.w; }
       this.bottomInfo.y = this.bottomInfo.y + lastGridItemPoint.y + lastGridItemPoint.h;
     }
-    layout.push(this.bottomInfo);
-    this.layout = layout;
   }
 
   @Watch('pageName', { immediate: true })