增加了cell渲染判断。review by shixiang。

@@ -15,6 +15,7 @@ import ReactNative, {
     NativeAppEventEmitter,
     StyleSheet,
 } from 'react-native';
+import Immutable from 'immutable';
 import SingleImage from './SingleImage';
 
 import {SlicedImage} from '../../../common/components/SlicedImage';
@@ -26,7 +27,14 @@ export default class BrandArticleCell extends Component {
     constructor(props) {
         super(props);
         this._renderTimeAndVisit = this._renderTimeAndVisit.bind(this);
+    }
 
+    shouldComponentUpdate(nextProps,nextState){
+        if (Immutable.is(nextProps.rowData, this.props.rowData)) {
+            return false;
+        } else {
+            return true;
+        }
     }
 
     //时间和访问次数以及是否喜欢