增加get 保护 review by yuliang。

@@ -74,12 +74,12 @@ export function pressCategoryBMore(category_id){
 		let {categoryB} = getState();
 
 		//获取当前频道下一级分类列表信息
-		let categoryData = categoryB.categoryList.get(categoryB.currentChannelValue);
+		let categoryData = categoryB.categoryList ? categoryB.categoryList.get(categoryB.currentChannelValue) : [];
 
 		//获取指定category_id分类信息
 		let category = null; 
 		categoryData.map((item, i) => {
-			if(category_id == item.get('category_id')){
+			if(item && (category_id == item.get('category_id'))){
 				category = item;
 			}
 		});
@@ -92,7 +92,7 @@ export function pressCategoryBMore(category_id){
         };
 
         //设置当前的类别信息
-    	dispatch(setCurrentCateB(category_id, category.get('category_name')));
+    	dispatch(setCurrentCateB(category_id, category ? category.get('category_name') : ""));
         dispatch(jumpToCategory(all, 0, categoryB.currentChannelId));
         
 	};
@@ -113,7 +113,7 @@ export function getCategoryBSubCategoryDetail(category_id, category_value){
 		//检查缓存是否存在数据，如果不存在则获取
         let cache = categoryB.cacheSubCateData;
         let key = getSubDetailCacheKey(currentChannelId, category_id);
-        let categoryData = cache.get(key);
+        let categoryData = cache ? cache.get(key) : "";
 
         //设置当前的类别信息
         dispatch(setCurrentCateB(category_id, category_value));
@@ -201,7 +201,10 @@ export function getCategoryBFirstSubCategoryDetail(channel_id) {
 		else if(channel_id == '4'){
 			category = categoryList.get('lifestyle').get(0);
 		}
-		dispatch(getCategoryBSubCategoryDetail(category.get('category_id'), category.get('category_name')));
+
+		let category_id = category ? category.get('category_id') : "";
+		let category_name = category ? category.get('category_name') : "";
+		dispatch(getCategoryBSubCategoryDetail(category_id, category_name));
 	};
 }