'build' 方法在 Flutter 的超类型中始终是抽象的

Question

我每次都试图在颤动中重建我的 TabController 屏幕，为此我需要在 Widget build(BuildContext context) 方法中添加 super.build(context); 。但我在编译时出错

我收到以下错误

The method 'build' is always abstract in the supertype. (Documentation)

这是我的代码

class TrendingScreen 扩展了 StatefulWidget { @覆盖 _TrendingScreenState createState() => _TrendingScreenState(); }

class _TrendingScreenState extends State<TrendingScreen> {

  @override
  Widget build(BuildContext context) {
    super.build(context);

    return Scaffold(
        backgroundColor: colorSecondary,
        appBar: customAppbar(),
        body: Container(
            height: double.infinity,
            width: double.infinity,
            child: buildTrendingList()));
  }
}

Answer 1

我缺少一个将 mixin 与 AutomaticKeepAliveClientMixin 添加到状态 class 然后你可以调用 super.build(context);

'build' 方法在 Flutter 的超类型中始终是抽象的

The method 'build' is always abstract in the supertype in Flutter

build

dart

flutter