fix bugs on device. reviewed by盖建秋

@@ -231,8 +231,8 @@ export function clearHistory(selectedProducts) {
 				let {productList, selectedProductList} = browse;
 							console.log('000')
 			dispatch(deleteSelectedProducts(selectedProducts));
-				// dispatch(historyClearSuccess({productList, selectedProductList}));
-				ReactNative.NativeModules.YH_RecorderHelper.setRightClearButtonVisiblity(false);
+				let show = productList.size > 0;
+				ReactNative.NativeModules.YH_RecorderHelper.setRightClearButtonVisiblity(show);
 			})
 			.catch(error => {
 				dispatch(historyClearFailure(error));

@@ -81,7 +81,7 @@ export default function browseReducer(state=initialState, action) {
 		case HISTORY_CLEAR_SUCCESS: {
 			let {productList,categoryList,index} = action.payload;
 
-			let show = productList.size==0;
+			let show = productList.length==0;
 
 			return state.set('isDeleting', false)
 			.set('productList',  Immutable.fromJS(productList))