UI修改 --review by 孙凯

@@ -172,15 +172,12 @@ export default class Product extends Component {
             currentTab,
         } = this.props.data;
         let {productList} = globalProduct;
-        if (productList.size == 0) {
-            return null;
-        }
         let {selectedProductList, categoryList, selectedCategoryIndex} = commonProduct;
         let isShow = currentTab === 'common' && selectedProductList.size > 0;
 
         return (
             <View>
-                <TabHeader
+                {productList.size > 0 ? <TabHeader
                     currentTab={currentTab}
                     onPressTab={(tab)=>{
                         if (tab == currentTab) {
@@ -190,7 +187,7 @@ export default class Product extends Component {
                         this.setState({currentlyOpenSwipeable: null});
                         this.props.onPressTab && this.props.onPressTab(tab);
                     }}
-                />
+                /> : null}
                 {isShow ? <CategorySelector
                     data={categoryList}
                     selectedCategoryIndex={selectedCategoryIndex}