huixiang_app/lib/community/community_page.dart

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

import 'community_course.dart';
import 'headlines/article_page.dart';

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

class _CommunityPage extends State<CommunityPage>
    with SingleTickerProviderStateMixin {
  TabController tabcontroller;

  CommunityChildPage guanzhu,tuijian ;
  final GlobalKey tuijianKey = GlobalKey();
  final GlobalKey guanzhuKey = GlobalKey();

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

  @override
  void initState() {
    super.initState();



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

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

  _toRelease() async {
    await Navigator.of(context).pushNamed('/router/release_dynamic');
    if(tabcontroller.index == 0){
      CommunityChildPageState page = guanzhuKey.currentState;
      page.onRefresh();
    }else if(tabcontroller.index == 1){
      CommunityChildPageState page = tuijianKey.currentState;
      page.onRefresh();
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: MyAppBar(
        leading: false,
        titleChild: PreferredSize(
          preferredSize: Size(
            MediaQuery.of(context).size.width - 60.w,
            38.h,
          ),
          child: TabBar(
            controller: tabcontroller,
            automaticIndicatorColorAdjustment: true,
            isScrollable: true,
            indicatorWeight: 2,
            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(),
          ),
        ),
        onTap: () {
          _toRelease();
        },
        action: GestureDetector(
          behavior: HitTestBehavior.opaque,
          child: Container(color: Colors.transparent,
          padding: EdgeInsets.only(left: 20.w,right: 20.w),
          child: SvgPicture.asset(
            "assets/svg/shequ_fabu.svg",
            fit: BoxFit.contain,
            width: 24,
            height: 24,
          ),)
        )
      ),
      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 == "学习健康"){
              return CommunityCourse();
            }
            else if(e == "分享健康"){
              if (tuijian == null){
                tuijian = CommunityChildPage(tuijianKey,"分享健康",onChildScroll);
              }
              return tuijian;
            }else if(e == "关注"){
              if (guanzhu == null){
                guanzhu = CommunityChildPage(guanzhuKey,"关注",onChildScroll);
              }
              return guanzhu;
            }
          }).toList(),
          controller: tabcontroller,
        ),
      ),
    );
  }
}