factor:布局颜色重构

lib/pages/home_page.dart

@@ -1,7 +1,7 @@
 import 'package:blog_app/apis/blog.dart';
-import 'package:blog_app/layout/drawer.dart';
+import 'package:blog_app/layout/app_drawer.dart';
+import 'package:blog_app/layout/app_navbar.dart';
 import 'package:blog_app/layout/menu.dart';
-import 'package:blog_app/layout/nav_bar.dart';
 import 'package:blog_app/models/blog.dart';
 import 'package:blog_app/widget/search.dart';
 import 'package:flutter/material.dart';
@@ -165,7 +165,7 @@ class _HomePageState extends State<HomePage> {
     return buildSearchResultList(context, _searchResults);
   }
 
-  void _onBottomNavTap(int index) {
+  void _onTapNavbarItem(int index) {
     setState(() {
       _currentPageIndex = index;
       if (_isSearching) {
@@ -194,37 +194,6 @@ class _HomePageState extends State<HomePage> {
     Navigator.pop(context);
   }
 
-  Widget _buildDrawerBody() {
-    return ListView(
-      padding: EdgeInsets.zero,
-      children: [
-        ...List.generate(
-          pages.length,
-          (index) => buildDrawerItem(
-            context: context,
-            page: pages[index],
-            isSelected: index == _currentPageIndex,
-            onTap: () => onTapDrawerItem(index),
-          ),
-        ),
-      ],
-    );
-  }
-
-  Widget _buildDrawer() {
-    return Drawer(
-      child: Container(
-        color: Colors.white,
-        child: Column(
-          children: [
-            buildDrawerHeader(context),
-            Expanded(child: _buildDrawerBody()),
-          ],
-        ),
-      ),
-    );
-  }
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -235,12 +204,14 @@ class _HomePageState extends State<HomePage> {
         leading: _buildLeading(),
         actions: _buildAppBarActions(),
       ),
-      drawer: _buildDrawer(),
+      drawer: AppDrawer(
+        currentPageIndex: _currentPageIndex,
+        onTapDrawerItem: onTapDrawerItem,
+      ),
       body: Padding(padding: EdgeInsets.all(10), child: _buildPageView()),
-      bottomNavigationBar: buildBottomNavigationBar(
-        context: context,
-        index: _currentPageIndex,
-        onTap: _onBottomNavTap,
+      bottomNavigationBar: AppNavbar(
+        currentPageIndex: _currentPageIndex,
+        onTapNavbarItem: _onTapNavbarItem,
       ),
     );
   }