没有脚手架的DefaultTabController?

问题描述

我正在尝试在某些小部件中间使用 DefaultTabController .因此，我的 TabBar 不能位于 AppBar 中，而必须位于某些小部件中.所以我的问题是，当我使用 TabBarView 时，它崩溃了...

I'm trying to use DefaultTabController in the middle of some widgets. So my TabBar could not be in AppBar and has to be down some widgets.So my problem is when I use TabBarView it crashes...

所以这是Flutter示例的一个示例，但是没有找到 Scaffold 却找不到方法.

So here's an example of Flutter sample but no found how to do it without Scaffold.

final List<Tab> myTabs = <Tab>[
  Tab(text: 'LEFT'),
  Tab(text: 'RIGHT')];

代码

DefaultTabController(
  length: myTabs.length,
  child: Scaffold(
    appBar: TabBar(
      tabs: myTabs,
    ),
    body: TabBarView(
      children: myTabs.map((Tab tab) {
        final String label = tab.text.toLowerCase();
        return Center(
          child: Text(
            'This is the $label tab',
            style: const TextStyle(fontSize: 36),
          ),
        );
      }).toList(),
    ),
  ),
);

这里是TabBar的另一个示例，我应该图像

Here is another example of a TabBar I should do image

真实代码

class ProfileTabBarNavigation extends StatelessWidget {
 final List<Tab> myTabs = <Tab>[
   const Tab(text: kArtwork),
   const Tab(text: kPastJobs)];
@override
Widget build(BuildContext context) {
return DefaultTabController(
  length: 2,
  initialIndex: 0,
  child: Padding(
    padding: kPaddingTabBar,
    child: Container(
      padding: EdgeInsets.all(5.0),
      decoration: BoxDecoration(
        color: kLightGrey,
        borderRadius: BorderRadius.all(
          Radius.circular(50),
        ),
      ),
      child: Column(children: <Widget>[
        TabBar(
          tabs: myTabs,
          unselectedLabelColor: Colors.black54,
          labelColor: Colors.black,
          unselectedLabelStyle: kBoldText,
          labelStyle: kBoldText,
          indicatorSize: TabBarIndicatorSize.tab,
          indicator: BoxDecoration(
            shape: BoxShape.rectangle,
            borderRadius: BorderRadius.circular(50),
            color: Colors.white,
          ),
        ),
        TabBarView(
          children: myTabs.map((Tab tab) {
            final String label = tab.text.toLowerCase();
            return Center(
              child: Text(
                'This is the $label tab',
                style: const TextStyle(fontSize: 36),
              ),
            );
          }).toList(),
        ),
      ]),
    ),
  ),
);
}
}

推荐答案

用TabBarView .html"rel =" nofollow noreferrer>已扩展.

Wrap your TabBarView with Expanded.

Expanded(
 child: TabBarView(//...),
),

在 DartPad

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