feat:增加博客分类模块

lib/widget/blog.dart

@@ -1,5 +1,7 @@
 import 'package:blog_app/models/blog.dart';
+import 'package:blog_app/pages/blog_detail_page.dart';
 import 'package:blog_app/utils/date_utils.dart';
+import 'package:blog_app/widget/common.dart';
 import 'package:flutter/material.dart';
 
 class BlogLabel {
@@ -111,34 +113,45 @@ class BlogCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final colors = Theme.of(context).colorScheme;
-
-    return Card(
-      elevation: 0,
-      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
-      child: Container(
-        width: double.infinity,
-        decoration: BoxDecoration(
-          color: colors.surface,
-          borderRadius: BorderRadius.circular(12),
-          border: Border.all(color: colors.outline.withAlpha(50), width: 1),
-        ),
-        child: Padding(
-          padding: EdgeInsets.all(20),
-          child: Column(
-            crossAxisAlignment: CrossAxisAlignment.center,
-            children: [
-              _buildBlogTitle(context),
-              SizedBox(height: 16),
-              _buildBlogLabel(),
-              SizedBox(height: 16),
-              Container(height: 1, width: 80, color: Theme.of(context).colorScheme.primary),
-              SizedBox(height: 16),
-              _buildBlogSummary(),
-            ],
-          ),
+    return buildCard(
+      context: context,
+      child: Padding(
+        padding: EdgeInsets.all(12),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.center,
+          children: [
+            _buildBlogTitle(context),
+            SizedBox(height: 16),
+            _buildBlogLabel(),
+            SizedBox(height: 16),
+            Container(
+              height: 1,
+              width: 80,
+              color: Theme.of(context).colorScheme.primary,
+            ),
+            SizedBox(height: 16),
+            _buildBlogSummary(),
+          ],
         ),
       ),
     );
   }
 }
+
+void navigatorToBlogDetail(BuildContext context, int blogId) {
+  Navigator.push(
+    context,
+    MaterialPageRoute(builder: (context) => BlogDetailPage(blogId: blogId)),
+  );
+}
+
+Widget buildEmpty() {
+  return Center(
+    child: Column(
+      mainAxisAlignment: MainAxisAlignment.center,
+      children: [
+        Text('暂无数据', style: TextStyle(fontSize: 16, color: Colors.grey)),
+      ],
+    ),
+  );
+}

lib/widget/common.dart

@@ -0,0 +1,18 @@
+import 'package:flutter/material.dart';
+
+Widget buildCard({required BuildContext context, required Widget child}) {
+  final colors = Theme.of(context).colorScheme;
+  return Card(
+    elevation: 0,
+    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+    child: Container(
+      width: double.infinity,
+      decoration: BoxDecoration(
+        color: colors.surface,
+        borderRadius: BorderRadius.circular(12),
+        border: Border.all(color: colors.outline.withAlpha(50), width: 1),
+      ),
+      child: Padding(padding: EdgeInsets.all(8), child: child),
+    ),
+  );
+}

lib/widget/easy_refresh.dart

@@ -0,0 +1,65 @@
+import 'package:easy_refresh/easy_refresh.dart';
+import 'package:flutter/material.dart';
+
+Widget buildEasyRefresh({
+  required EasyRefreshController freshController,
+  required Future<void> Function()? onRefresh,
+  required Future<void> Function()? onLoad,
+  required Widget body,
+}) {
+  return EasyRefresh(
+    controller: freshController,
+    header: ClassicHeader(
+      dragText: '下拉刷新',
+      armedText: '释放刷新',
+      readyText: '准备刷新',
+      processingText: '刷新中...',
+      processedText: '刷新完成',
+      failedText: '刷新失败',
+      noMoreText: '没有更多数据',
+      showText: true,
+      messageText: '更新于 %T',
+      showMessage: true,
+    ),
+    footer: ClassicFooter(
+      dragText: '上拉加载',
+      armedText: '释放加载',
+      readyText: '准备加载',
+      processingText: '加载中...',
+      processedText: '加载完成',
+      failedText: '加载失败',
+      noMoreText: '没有更多数据',
+      showText: true,
+      messageText: '更新于 %T',
+      showMessage: true,
+    ),
+    onRefresh: onRefresh,
+    onLoad: onLoad,
+    child: body,
+  );
+}
+
+Widget buildScrollToTop({
+  required BuildContext context,
+  required VoidCallback scrollToTop,
+}) {
+  return Positioned(
+    right: 0,
+    bottom: 20,
+    child: FloatingActionButton(
+      onPressed: scrollToTop,
+      backgroundColor: Theme.of(context).colorScheme.primary,
+      elevation: 2,
+      mini: true,
+      child: const Icon(Icons.arrow_upward, color: Colors.white),
+    ),
+  );
+}
+
+void scrollToTopAnimateTo(ScrollController controller) {
+  controller.animateTo(
+    0,
+    duration: const Duration(milliseconds: 500), // 滚动动画时长
+    curve: Curves.easeInOut, // 滚动动画曲线
+  );
+}