分享代码

    Widget _defalutTabController() {
      Widget _tabBarCell(Color col) {
        return Container(
          child: Expanded(
            child: Container(
              color: MusicColors.slRandomColor(),
              margin: EdgeInsets.all(10),
            ),
          ),
        );
      }

      List<Widget> _tabBarRowChildrenList = <Widget>[
        _tabBarCell(Colors.blue),
        _tabBarCell(Colors.yellow),
        _tabBarCell(Colors.black),
        _tabBarCell(Colors.orange),
      ];

      Widget _tabBarPageView(Color col) {
        return Container(
          margin: EdgeInsets.only(top: 35, left: 10, right: 10, bottom: 10),
          padding: EdgeInsets.all(2),
          color: col, //MusicColors.slRandomColor(),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceAround,
            children: _tabBarRowChildrenList,
          ),
        );
      }

      List<Widget> _tabBarViewChildrenList = <Widget>[
        _tabBarPageView(Colors.purple),
        _tabBarPageView(Colors.yellow),
        _tabBarPageView(Colors.orange),
      ];

      Widget _tabbarView() {
        return TabBarView(
          physics: NeverScrollableScrollPhysics(),
          children: _tabBarViewChildrenList,
        );
      }

      _totalPageCount = _tabBarViewChildrenList.length;

      return DefaultTabController(
        length: _totalPageCount,
        child: Builder(
          builder: (BuildContext context) => Padding(
            padding: EdgeInsets.all(8.0),
            child: Container(
              color: Colors.red,
              child: Row(
                children: <Widget>[
                  Container(
                    child: IconButton(
                        tooltip: "上\n一\n页",
                        icon: Icon(Icons.arrow_back_ios),
                        onPressed: () {
                          final TabController _controller =
                              DefaultTabController.of(context);
                          if (_controller.index > 0) {
                            _controller.animateTo(_controller.index - 1);
                            setState(() {
                              _pageIndex = _controller.index;
                            });
                            print("object = $_pageIndex");
                          } else {
                            print("已经是第一页了");
                          }
                        }),
                  ),
                  Expanded(
                    child: Container(
                      // child: _tabbarView(),
                      // child: _listView(),
                      color: Colors.black45,
                    ),
                  ),
                  Container(
                    child: IconButton(
                      tooltip: "下\n一\n页",
                      icon: Icon(Icons.arrow_forward_ios),
                      onPressed: () {
                        final TabController _controller =
                            DefaultTabController.of(context);
                        print("_____${_controller.index}");
                        if (_controller.index != _totalPageCount - 1) {
                          _controller.animateTo(_controller.index + 1);
                          setState(() {
                            _pageIndex = _controller.index;
                          });
                          print("object = $_pageIndex");
                        } else {
                          print("final page");
                        }
                      },
                    ),
                  ),
                ],
              ),
            ),
          ),
        ),
      );
    }