✨ 优化代码,处理默认视图

lib/app/res/color_unit.dart

@@ -12,6 +12,9 @@ class ColorUnit{
   static const Color input_hit_text_color = Color(0xff939EA7);
   static const Color head_text_color = Color(0xff666666);
 
+  // 缺省相关
 
+  static const Color error_color = Colors.red;
+  static const Color warning_color = Colors.orangeAccent;
 
 }

lib/blocs/widgets/widgets_bloc.dart

@@ -44,7 +44,7 @@ class WidgetsBloc extends Bloc<WidgetsEvent, WidgetsState> {
       yield WidgetsLoaded(widgets: widgets, activeFamily: family);
     } catch (err) {
       print(err);
-      yield WidgetsLoadFailed();
+      yield WidgetsLoadFailed(err.toString());
     }
   }
 }

lib/blocs/widgets/widgets_state.dart

@@ -38,8 +38,11 @@ class WidgetsLoaded extends WidgetsState {
 }
 
 class WidgetsLoadFailed extends WidgetsState {
-  const WidgetsLoadFailed();
+  final String error;
+
+
+  const WidgetsLoadFailed(this.error);
 
   @override
-  List<Object> get props => [];
+  List<Object> get props => [error];
 }

lib/components/project/default/empty_shower.dart

@@ -0,0 +1,39 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_unit/app/res/color_unit.dart';
+import 'package:flutter_unit/app/res/style_unit.dart';
+
+/// create by 张风捷特烈 on 2020/11/17
+/// contact me by email 1981462002@qq.com
+/// 说明: 默认 数据为空视图
+
+class EmptyShower extends StatelessWidget {
+  final String message;
+
+  EmptyShower({Key key, this.message = "数据为空"}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    final Color color = Theme.of(context).primaryColor;
+
+    return Center(
+      child: Container(
+        alignment: FractionalOffset.center,
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          crossAxisAlignment: CrossAxisAlignment.center,
+          children: <Widget>[
+            Icon(Icons.style, color: color, size: 120.0),
+            Container(
+              padding: EdgeInsets.only(top: 10.0),
+              child: Text(
+                message,
+                textAlign: TextAlign.center,
+                style: TextStyleUnit.headTextStyle.copyWith(color: color),
+              ),
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/components/project/default/error_shower.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_unit/app/res/color_unit.dart';
+import 'package:flutter_unit/app/res/style_unit.dart';
+
+/// create by 张风捷特烈 on 2020/11/17
+/// contact me by email 1981462002@qq.com
+/// 说明: 默认 错误视图
+
+class ErrorShower extends StatelessWidget {
+  final String error;
+
+  ErrorShower({Key key, this.error = "出现异常"}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Center(
+      child: Wrap(
+        spacing: 10,
+        direction: Axis.vertical,
+        alignment: WrapAlignment.center,
+        crossAxisAlignment: WrapCrossAlignment.center,
+        children: [
+          Container(
+              width: 80,
+              height: 80,
+              child: Icon(
+                Icons.error,
+                size: 80,
+                color: ColorUnit.error_color,
+              )),
+          Text(
+            error,
+            style: TextStyleUnit.headTextStyle.copyWith(color: ColorUnit.error_color),
+            textAlign: TextAlign.center,
+          )
+        ],
+      ),
+    );
+  }
+}

lib/components/project/default/loading_shower.dart

@@ -5,7 +5,7 @@ import 'package:flutter_unit/components/permanent/loading/planet_loading.dart';
 
 /// create by 张风捷特烈 on 2020/10/24
 /// contact me by email 1981462002@qq.com
-/// 说明: 
+/// 说明:  默认 加载视图
 
 class LoadingShower extends StatelessWidget {
 

lib/repositories/itf/widget_repository.dart

@@ -1,5 +1,3 @@
-
-
 import 'package:flutter_unit/app/enums.dart';
 import 'package:flutter_unit/storage/dao/widget_dao.dart';
 import 'package:flutter_unit/model/node_model.dart';
@@ -9,12 +7,12 @@ import 'package:flutter_unit/model/widget_model.dart';
 /// contact me by email 1981462002@qq.com
 
 abstract class WidgetRepository {
-
   Future<List<WidgetModel>> loadWidgets(WidgetFamily family);
 
   Future<List<WidgetModel>> loadWidget(List<int> ids);
 
   Future<List<WidgetModel>> searchWidgets(SearchArgs args);
+
   Future<List<NodeModel>> loadNode(WidgetModel widgetModel);
 
   Future<void> toggleCollect(int id);
@@ -22,4 +20,4 @@ abstract class WidgetRepository {
   Future<List<WidgetModel>> loadCollectWidgets();
 
   Future<bool> collected(int id);
-}
+}

lib/views/pages/home/home_page.dart

@@ -9,7 +9,9 @@ import 'package:flutter_unit/app/router.dart';
 import 'package:flutter_unit/blocs/bloc_exp.dart';
 import 'package:flutter_unit/components/permanent/feedback_widget.dart';
 import 'package:flutter_unit/components/permanent/overlay_tool_wrapper.dart';
-import 'package:flutter_unit/components/project/loading_shower.dart';
+import 'package:flutter_unit/components/project/default/empty_shower.dart';
+import 'package:flutter_unit/components/project/default/error_shower.dart';
+import 'package:flutter_unit/components/project/default/loading_shower.dart';
 
 import 'package:flutter_unit/model/widget_model.dart';
 import 'package:flutter_unit/views/common/empty_page.dart';
@@ -84,7 +86,12 @@ class _HomePageState extends State<HomePage>
 
     if (state is WidgetsLoaded) {
       List<WidgetModel> items = state.widgets;
-      if (items.isEmpty) return EmptyPage();
+      if (items.isEmpty)
+        return SliverFillRemaining(
+          child: EmptyShower(
+            message: "没数据，哥也没办法\n(≡ _ ≡)/~┴┴",
+          ),
+        );
       return SliverList(
         delegate: SliverChildBuilderDelegate(
             (_, int index) => _buildHomeItem(items[index]),
@@ -93,11 +100,10 @@ class _HomePageState extends State<HomePage>
     }
 
     if (state is WidgetsLoadFailed) {
-      return SliverToBoxAdapter(
-        child: Container(
-          child: Text('加载数据异常'),
-        ),
-      );
+      return SliverFillRemaining(
+          child: ErrorShower(
+        error: "数据加载异常:\n${state.error}",
+      ));
     }
     return Container();
   }

lib/views/pages/search/empty_page.dart

@@ -1,29 +0,0 @@
-import 'package:flutter/material.dart';
-
-class EmptyPage extends StatelessWidget {
-
-
-  @override
-  Widget build(BuildContext context) {
-    return Center(child: Container(
-      alignment: FractionalOffset.center,
-      child:  Column(
-        mainAxisAlignment: MainAxisAlignment.center,
-        crossAxisAlignment: CrossAxisAlignment.center,
-        children: <Widget>[
-           Icon(Icons.event_busy, color: Colors.orangeAccent, size: 120.0),
-           Container(
-            padding:  EdgeInsets.only(top: 16.0),
-            child:  Text(
-              "没数据，哥也没办法，(≡ _ ≡)/~┴┴",
-              style:  TextStyle(
-                fontSize: 20,
-                color: Colors.orangeAccent,
-              ),
-            ),
-          )
-        ],
-      ),
-    ),);
-  }
-}

lib/views/pages/search/serach_page.dart

@@ -13,7 +13,7 @@ import 'package:flutter_unit/views/common/loading_page.dart';
 import 'package:flutter_unit/views/pages/search/not_search_page.dart';
 import 'package:flutter_unit/components/permanent/multi_chip_filter.dart';
 
-import 'empty_page.dart';
+import '../../../components/project/default/empty_shower.dart';
 
 
 class SearchPage extends StatefulWidget {
@@ -98,7 +98,7 @@ class _SearchPageState extends State<SearchPage> {
     if (state is SearchStateLoading) return SliverToBoxAdapter(child: LoadingPage());
     if (state is SearchStateError) return SliverToBoxAdapter(child: ErrorPage());
     if (state is SearchStateSuccess) return _buildSliverList(state.result);
-    if (state is SearchStateEmpty) return SliverToBoxAdapter(child: EmptyPage());
+    if (state is SearchStateEmpty) return SliverToBoxAdapter(child: EmptyShower(message: "没数据，哥也没办法\n(≡ _ ≡)/~┴┴",));
     return NotSearchPage();
   }