mod: homePage开发、mainPage优化
This commit is contained in:
guozhigq
@ -0,0 +1,47 @@
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import 'package:flutter/cupertino.dart';
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import 'package:get/get.dart';
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import 'package:pilipala/http/api.dart';
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import 'package:pilipala/http/init.dart';
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class HomeController extends GetxController {
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final ScrollController scrollController = ScrollController();
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int count = 12;
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int _currentPage = 1;
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int crossAxisCount = 2;
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RxList videoList = [].obs;
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bool isLoadingMore = false;
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@override
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void onInit() {
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super.onInit();
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queryRcmdFeed('init');
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}
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// 获取推荐
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Future queryRcmdFeed(type) async {
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var res = await Request().get(
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Api.recommendList,
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data: {'feed_version': "V3", 'ps': count, 'fresh_idx': _currentPage},
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);
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var data = res.data['data']['item'];
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if (type == 'init') {
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videoList.value = data;
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} else if (type == 'onRefresh') {
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videoList.insertAll(0, data);
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} else if (type == 'onLoad') {
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videoList.addAll(data);
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}
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_currentPage += 1;
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isLoadingMore = false;
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}
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// 下拉刷新
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Future onRefresh() async {
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queryRcmdFeed('onRefresh');
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}
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// 上拉加载
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Future onLoad() async {
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await Future.delayed(const Duration(milliseconds: 500));
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queryRcmdFeed('onLoad');
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}
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}
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@ -1,18 +1,151 @@
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import 'package:flutter/material.dart';
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import 'package:get/get.dart';
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import './controller.dart';
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import 'package:pilipala/common/constants.dart';
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import 'package:pilipala/pages/home/widgets/app_bar.dart';
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class HomePage extends StatefulWidget {
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const HomePage({super.key});
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const HomePage({Key? key}) : super(key: key);
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@override
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State<HomePage> createState() => _HomePageState();
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}
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class _HomePageState extends State<HomePage> {
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class _HomePageState extends State<HomePage>
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with AutomaticKeepAliveClientMixin {
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final HomeController _homeController = Get.put(HomeController());
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List videoList = [];
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@override
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bool get wantKeepAlive => true;
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@override
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void initState() {
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super.initState();
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_homeController.videoList.listen((value) {
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videoList = value;
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setState(() {});
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});
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_homeController.scrollController.addListener(
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() {
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if (_homeController.scrollController.position.pixels >=
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_homeController.scrollController.position.maxScrollExtent - 200) {
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if (!_homeController.isLoadingMore) {
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_homeController.isLoadingMore = true;
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_homeController.onLoad();
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}
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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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super.build(context);
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return Scaffold(
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appBar: AppBar(
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title: const Text('推荐'),
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// body: NestedScrollView(
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// headerSliverBuilder: (context, innerBoxIsScrolled) => [
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// const HomeAppBar()
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// ],
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body: RefreshIndicator(
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displacement: kToolbarHeight + MediaQuery.of(context).padding.top,
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onRefresh: () async {
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return await _homeController.onRefresh();
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},
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child: CustomScrollView(
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controller: _homeController.scrollController,
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slivers: [
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const HomeAppBar(),
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// SliverPersistentHeader(
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// delegate: MySliverPersistentHeaderDelegate(),
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// pinned: true,
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// ),
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SliverPadding(
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// 单列布局 EdgeInsets.zero
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padding: _homeController.crossAxisCount == 1
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? EdgeInsets.zero
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: const EdgeInsets.fromLTRB(
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StyleString.cardSpace, 0, StyleString.cardSpace, 8),
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sliver: SliverGrid(
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gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
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// 行间距
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mainAxisSpacing: StyleString.cardSpace,
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// 列间距
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crossAxisSpacing: StyleString.cardSpace,
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// 列数
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crossAxisCount: _homeController.crossAxisCount,
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mainAxisExtent: MediaQuery.of(context).size.width /
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_homeController.crossAxisCount *
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(10 / 16) +
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72),
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delegate: SliverChildBuilderDelegate(
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(BuildContext context, int index) {
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return Container(
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color: Theme.of(context).colorScheme.surfaceVariant,
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child: Text(index.toString()),
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);
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},
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childCount: videoList.isNotEmpty ? videoList.length : 10,
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),
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),
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),
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const LoadingMore()
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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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}
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class MySliverPersistentHeaderDelegate extends SliverPersistentHeaderDelegate {
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@override
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Widget build(
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BuildContext context, double shrinkOffset, bool overlapsContent) {
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return Container(
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alignment: Alignment.center,
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decoration: BoxDecoration(
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color: Theme.of(context).colorScheme.surface,
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border: Border(
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bottom: BorderSide(
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color: Theme.of(context).dividerColor.withOpacity(0.1),
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),
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)),
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child: const Text(
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'我是一个SliverPersistentHeader',
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),
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);
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}
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@override
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double get maxExtent => 55.0;
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@override
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double get minExtent => 55.0;
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@override
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bool shouldRebuild(SliverPersistentHeaderDelegate oldDelegate) =>
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true; // 如果内容需要更新，设置为true
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}
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// loading more
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class LoadingMore extends StatelessWidget {
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const LoadingMore({super.key});
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@override
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Widget build(BuildContext context) {
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return SliverToBoxAdapter(
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child: Container(
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height: MediaQuery.of(context).padding.bottom + 80,
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padding: EdgeInsets.only(bottom: MediaQuery.of(context).padding.bottom),
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child: Center(
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child: Text(
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'加载中...',
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style: TextStyle(
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color: Theme.of(context).colorScheme.outline, fontSize: 13),
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),
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),
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),
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);
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}
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58
lib/pages/home/widgets/app_bar.dart
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58
lib/pages/home/widgets/app_bar.dart
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@ -0,0 +1,58 @@
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import 'dart:io';
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import 'package:flutter/material.dart';
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class HomeAppBar extends StatelessWidget {
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const HomeAppBar({super.key});
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@override
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Widget build(BuildContext context) {
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return SliverAppBar(
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// forceElevated: true,
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scrolledUnderElevation: 0,
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toolbarHeight: Platform.isAndroid
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? (MediaQuery.of(context).padding.top + 6)
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: Platform.isIOS
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? MediaQuery.of(context).padding.top - 2
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: kToolbarHeight,
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expandedHeight: kToolbarHeight + MediaQuery.of(context).padding.top,
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automaticallyImplyLeading: false,
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pinned: true,
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floating: true,
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primary: false,
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flexibleSpace: LayoutBuilder(
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builder: (context, constraints) {
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return FlexibleSpaceBar(
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background: Column(
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children: [
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AppBar(
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centerTitle: false,
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title: const Text(
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'PiLiPaLa',
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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letterSpacing: 1,
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),
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),
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actions: [
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IconButton(
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onPressed: () {},
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icon: const Icon(Icons.notifications_none_rounded),
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),
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IconButton(
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onPressed: () {},
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icon: const Icon(Icons.search_rounded),
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),
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const SizedBox(width: 10)
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],
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elevation: 0,
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scrolledUnderElevation: 0,
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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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);
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}
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}
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