Flutter动态加载TabBar_flutter tabcontroller动态

效果图：

这里主要是用了TabController这个controller，而不是用的默认的DefaultTabController，TabBar跟TabBarView必须关联起来，否则会报错。我这个上面的代码改得还有点多，因为还加入了listview，各位看官就暂时凑合着看吧。

源码贴出来

源码：

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:guoding/api/data_utils.dart';
import 'package:guoding/model/topic_head_bean.dart';
import 'package:guoding/resources/my_dimens.dart';
import 'package:guoding/resources/mycolor_resources.dart';
import 'package:guoding/routers/application.dart';
import 'package:guoding/ui/home/top/topic_list_page.dart';
import 'package:guoding/widgets/my_tab_indicator.dart';

class MoreTopicPage extends StatefulWidget {
   
  @override
  State<StatefulWidget> createState() {
   
    return MoreTopicPageState();
  }
}

class MoreTopicPageState extends State<MoreTopicPage>
    with TickerProviderStateMixin {
   
  bool hasTopLoad = false;

  List<TopicHeadLists> mTabs = new List();

  TabController _tabController;

  int _selectedIndex;

  @override
  void initState() {
   
    super.initState();
    _tabController = new TabController(length: mTabs.length, vsync: this);
    _tabController.addListener(() {
   
      setState(() => _selectedIndex = _tabController.index);
      print("liucheng-> ${_tabController.indexIsChanging}");<
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