1:搜索页搜索结果为空的时新增无图书内容提示

lib/pages/search/view.dart

@@ -50,7 +50,9 @@ class _SearchPageState extends State<SearchPage> {
             )
           ],
         ),
-        body: buildListView(controller),
+        body:
+        buildListView(controller),
+
       ),
     );
   }
@@ -61,28 +63,48 @@ class _SearchPageState extends State<SearchPage> {
       return BuildHistory(controller: controller);
     } else {
       // 如果条件为false，显示搜索到的书籍
-      return ListView.builder(
+      if(controller.books.isEmpty){
+        return
+          SingleChildScrollView(
+              child:Container(
+                padding: EdgeInsets.only(top: 110.w),
+                alignment: Alignment.center,
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.center,
+                  children: [
+                    SizedBox(height: 152.w, width: 195.w,
+                      child: Image.asset( 'assets/images/none.png',),),
+                    SizedBox(height: 13.w,),
+                    Text('暂无图书，请检查输入内容',style: TextStyle(fontSize: 14.w,color: Colours.c9),),
+                  ],
+                ),
+              ),
+          );
+      }else{
+        return ListView.builder(
           // shrinkWrap: true,
           // physics: NeverScrollableScrollPhysics(),
-          scrollDirection: Axis.vertical,
-          itemCount: controller.books.length,
-          itemBuilder: (BuildContext context, int index) {
-            CourseModel model = controller.books[index];
-            return GestureDetector(
-              onTap: () {
-                context.pushNamed(Routes.bookDetail,
-                    queryParameters: {'book_id': model.bookId.toString()});
-              },
-              child: LibraryCell(
-                model: model,
+            scrollDirection: Axis.vertical,
+            itemCount: controller.books.length,
+            itemBuilder: (BuildContext context, int index) {
+              CourseModel model = controller.books[index];
+              return GestureDetector(
                 onTap: () {
-                  controller.love(
-                      bookId: model.bookId.toString(),
-                      isCollection: model.isCollection!);
+                  context.pushNamed(Routes.bookDetail,
+                      queryParameters: {'book_id': model.bookId.toString()});
                 },
-              ),
-            );
-          });
+                child: LibraryCell(
+                  model: model,
+                  onTap: () {
+                    controller.love(
+                        bookId: model.bookId.toString(),
+                        isCollection: model.isCollection!);
+                  },
+                ),
+              );
+            });
+      }
+
     }
   }