channel 切换收起二级列表review草莓

@@ -29,12 +29,19 @@ export default class CategoryList extends Component {
         this.state = {
             offsetx: 0,
         };
+        this.cacheChannel='';
     }
     componentWillMount() {
       // Animate creation
       LayoutAnimation.configureNext(LayoutAnimation.Presets.spring);
     }
-
+    
+    componentWillUpdate(nextProps,nextState){
+        if(this.cacheChannel!=nextProps.currentChannelId){
+            this.setState({offsetx:0});
+            this.cacheChannel=nextProps.currentChannelId;
+        }
+    }
     _pressLeftRow(value,rowID){
       this.props.pressLeftRow(value,rowID);
       if(rowID==this.props.currentCateId){