huixiang_app/lib/community/community_page.dart

import 'dart:ui';

import 'package:flutter/material.dart';
import 'package:huixiang/community/community_child_page.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:huixiang/view_widget/my_tab.dart';

import '../utils/upload_async.dart';
import 'community_course.dart';

class CommunityPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _CommunityPage();
  }
}

class _CommunityPage extends State<CommunityPage>
    with
        SingleTickerProviderStateMixin,
        AutomaticKeepAliveClientMixin,
        UploadObserver {
  TabController? tabcontroller;

  CommunityChildPage? guanzhu, tuijian;

  final GlobalKey tuijianKey = GlobalKey();
  final GlobalKey guanzhuKey = GlobalKey();

  List<String> lables = [
    "关注",
    "广场",
    // "了解健康",
    "视频",
    // "关于回乡",
    // "直播",
  ];
  ScrollPhysics b = BouncingScrollPhysics();
  int scrollCount = 0;

  @override
  void initState() {
    super.initState();
    UploadInstance.instance.uploadObserverList.add(this);


    if (tabcontroller == null)
      tabcontroller = TabController(length: lables.length, vsync: this, initialIndex: 1);
  }

  @override
  void dispose() {
    super.dispose();
    UploadInstance.instance.uploadObserverList.remove(this);
  }

  void onChildScroll() {
    if (scrollCount == 0) {
      setState(() {
        b = NeverScrollableScrollPhysics();
      });
    }
    scrollCount += 1;
    Future.delayed(Duration(seconds: 1), () {
      scrollCount -= 1;
      if (scrollCount == 0) {
        setState(() {
          b = BouncingScrollPhysics();
        });
      }
    });
  }

  @override
  void onUploadFinish() {
    if (tabcontroller?.index == 0) {
      CommunityChildPageState? page =
          guanzhuKey.currentState as CommunityChildPageState?;
      page?.onRefresh();
    } else if (tabcontroller?.index == 1) {
      CommunityChildPageState? page =
          tuijianKey.currentState as CommunityChildPageState?;
      page?.onRefresh();
    }
  }

  _toRelease() async {
    Navigator.of(context).pushNamed('/router/release_dynamic');
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Scaffold(
      appBar: AppBar(
        centerTitle: true,
        title: SizedBox(
          width: MediaQuery.of(context).size.width - 160,
          child: TabBar(
            controller: tabcontroller,
            automaticIndicatorColorAdjustment: true,
            isScrollable: false,
            indicatorWeight: 2,
            dividerHeight: 0,
            dividerColor: Colors.transparent,
            indicatorColor: Color(0xFF39B54A),
            labelPadding: EdgeInsets.only(left: 8.w, right: 8.w),
            indicatorSize: TabBarIndicatorSize.label,
            unselectedLabelStyle: TextStyle(
              fontSize: MediaQuery.of(context).size.width >= 650 ? 10.sp : 15.sp,
              fontWeight: FontWeight.w400,
            ),
            labelStyle: TextStyle(
              color: Colors.black,
              fontSize:
              MediaQuery.of(context).size.width >= 650 ? 12.sp : 18.sp,
              fontWeight: FontWeight.bold,
            ),
            labelColor: Colors.black,
            tabs: lables.map((e) => MyTab(text: e)).toList(),
          ),
        ),
      ),
      body: Container(
        padding: EdgeInsets.only(bottom: 76.h),
        child: TabBarView(
          physics: b,
          children: lables.map((e) {
            // if (e == "关于回乡") {
            //   return BrandPage();
            // } else if(e == "了解健康"){
            //   return ArticlePage(onChildScroll);
            // } else
            if (e == "视频") {
              return CommunityCourse();
            } else if (e == "广场") {
              if (tuijian == null){
                tuijian = CommunityChildPage(tuijianKey,"广场",onChildScroll,_toRelease);
              }
              return tuijian!;
            } else if (e == "关注") {
              if (guanzhu == null){
                guanzhu = CommunityChildPage(guanzhuKey,"关注",onChildScroll,_toRelease);
              }
              return guanzhu!;
            }
            return tuijian!;
          }).toList(),
          controller: tabcontroller,
        ),
      ),
    );
  }

  @override
  bool get wantKeepAlive => true;
}