带有导航功能的 Flutter Provider

Question

目前，我有一个具有 3 种状态响应(成功、错误、正在运行)的提供者和监听该提供者的消费者。当提供商的响应是成功时，是否可以推送到另一条路线？这是我的消费者:

class SplashScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      body: _splashWidget(context),
    );
  }

  Widget _splashWidget(BuildContext context) {
    return Consumer<AccessTokenProvider>(builder: (context, myModel, child) {
      switch (myModel.accessToken.status) {
        case Status.COMPLETED:
        Navigator.of(context).pushReplacementNamed(MainRoute);
        return null;

        case Status.ERROR:
        return ErrorScreen();

        default:
          return SplashProcessing();
      }
    }, );
  }
}

这样做导航好吗？谢谢!

Answer 1

Widget _splashWidget(BuildContext context) {
    return Consumer<AccessTokenProvider>(builder: (context, myModel, child) {
      switch (myModel.accessToken.status) {
        case Status.COMPLETED:
        WidgetsBinding.instance.addPostFrameCallback((_) => 
           Navigator.of(context).pushReplacementNamed(MainRoute)); // can also use: Future.microtask(() => Navigator.of(context). pushReplacementNamed... );
        return Container(); // always return a widget in the build method, not null

        case Status.ERROR:
        return ErrorScreen();

        default:
          return SplashProcessing();
      }
    }, );
  }