当筛选栏在中间位置，点击筛选栏中某一项，筛选栏会自动滑到顶部悬浮，到达初始悬浮高度后往下滑取消悬浮 review by hongmo

@@ -52,13 +52,8 @@ export default class RedBrand extends Component {
 
     _onPressProductFilter(value){
 
-        if(value === 'filter'){
-            this.refs.redBrandList && this.refs.redBrandList.scrollTo({x: 0, y: yPosition, animated: false});
-        }
-        if(value==='default'){
-            this.refs.redBrandList && this.refs.redBrandList.scrollTo({x: 0, y: yPosition, animated: false});
+        this.refs.redBrandList && this.refs.redBrandList.scrollTo({x: 0, y: yPosition, animated: false});
 
-        }
         this.props.onPressProductFilter && this.props.onPressProductFilter(value);
 
     }