132 lines
3.5 KiB
Dart
132 lines
3.5 KiB
Dart
import 'package:blog_app/provider/blog.dart';
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import 'package:blog_app/widget/common.dart';
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import 'package:blog_app/widget/easy_refresh.dart';
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import 'package:blog_app/widget/blog.dart';
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import 'package:easy_refresh/easy_refresh.dart';
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class BlogPage extends StatefulWidget {
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const BlogPage({super.key});
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@override
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State<BlogPage> createState() => _BlogPageState();
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}
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class _BlogPageState extends State<BlogPage> {
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final EasyRefreshController _freshController = EasyRefreshController(
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controlFinishRefresh: true,
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controlFinishLoad: true,
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);
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final ScrollController _scrollController = ScrollController();
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bool _showScrollToTop = false;
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@override
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void initState() {
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super.initState();
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_scrollController.addListener(_onScroll);
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// 初始化加载数据
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WidgetsBinding.instance.addPostFrameCallback((_) {
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context.read<BlogProvider>().refreshBlogList();
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});
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}
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@override
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void dispose() {
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_scrollController.removeListener(_onScroll);
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_freshController.dispose();
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_scrollController.dispose();
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super.dispose();
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}
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// 下拉刷新
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Future<void> _onRefresh() async {
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await context.read<BlogProvider>().refreshBlogList();
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_freshController.finishRefresh();
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}
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// 上拉加载
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Future<void> _onLoad() async {
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final blogProvider = context.read<BlogProvider>();
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if (blogProvider.hasMore) {
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await blogProvider.loadMoreBlogList();
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_freshController.finishLoad(IndicatorResult.success);
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} else {
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_freshController.finishLoad(IndicatorResult.noMore);
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}
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}
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void _onScroll() {
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// 当滚动距离超过300时显示返回顶部按钮
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if (_scrollController.offset > 300) {
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if (!_showScrollToTop) {
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setState(() {
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_showScrollToTop = true;
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});
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}
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} else {
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if (_showScrollToTop) {
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setState(() {
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_showScrollToTop = false;
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});
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}
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}
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}
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// 滚动到顶部
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void _scrollToTop() => scrollToTopAnimateTo(_scrollController);
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Widget _buildBlogList(BlogProvider provider) {
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if (provider.error != null) {
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return buildErrorInfo(
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errorInfo: provider.error!,
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onPressed: () => provider.refreshBlogList(),
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);
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}
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return ListView.separated(
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controller: _scrollController,
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itemCount: provider.blogList.length,
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separatorBuilder: (context, index) => SizedBox(height: 8),
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itemBuilder: (context, index) {
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final blog = provider.blogList[index];
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return InkWell(
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onTap: () => navigatorToBlogDetail(context, blog.id),
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child: BlogCard(blog: blog),
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);
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},
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);
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}
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@override
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Widget build(BuildContext context) {
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final blogProvider = context.watch<BlogProvider>();
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return Stack(
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children: [
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Column(
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children: [
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Expanded(
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child: buildEasyRefresh(
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freshController: _freshController,
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onRefresh: _onRefresh,
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onLoad: _onLoad,
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body: Stack(
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children: [
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if (blogProvider.isLoading)
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buildLoadingIndicator()
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else
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_buildBlogList(blogProvider),
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],
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),
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),
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),
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],
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),
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if (_showScrollToTop)
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buildScrollToTop(context: context, scrollToTop: _scrollToTop),
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],
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);
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}
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}
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