factor:布局颜色重构

lib/main.dart

@@ -1,5 +1,6 @@
 import 'package:blog_app/pages/home_page.dart';
 import 'package:blog_app/provider/blog.dart';
+import 'package:blog_app/provider/theme_provider.dart';
 import 'package:blog_app/utils/sp_utils.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
@@ -12,6 +13,7 @@ void main() async {
     MultiProvider(
       providers: [
         ChangeNotifierProvider(create: (context) => BlogProvider()),
+        ChangeNotifierProvider(create: (context) => ThemeProvider()),
       ],
       child: MyApp(),
     ),
@@ -23,13 +25,12 @@ class MyApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final themeProvider = context.watch<ThemeProvider>();
+
     return MaterialApp(
       home: HomePage(),
       debugShowCheckedModeBanner: false,
-      theme: ThemeData(
-        useMaterial3: true,
-        fontFamily: 'CustomFont',
-      ),
+      theme: themeProvider.currentThemeData,
     );
   }
 }