更新拼团列表banner显示逻辑 review by sunkai

@@ -26,12 +26,13 @@ export default class GroupPurchase extends Component {
         } = this.props;
         let banner = productList.banner;
         let url = productList.url;
+        console.log('banner', banner);
 
-        if(banner === '' || url === '') return null;
+        if(banner === '') return null;
         
         return (
           <View style={styles.header}>
-            <TouchableOpacity activeOpacity={0.8} onPress={() => {
+            <TouchableOpacity activeOpacity={1} onPress={() => {
               this.props.didTouchBanner && this.props.didTouchBanner(url);
             }}>
               <YH_Image style={{width: '100%', height: '100%'}} url={banner}></YH_Image>

@@ -73,7 +73,9 @@ class GroupPurchaseContainer extends Component {
     }
 
     _didTouchBanner(url) {
-
+        if (!url) {
+            return;
+        }
         let params = {
             URL: url,
         };