Flutter:热重新加载和路由

Question

我注意到，当我扩展MaterialPageRoutes并像这样实例化它们时

class Route extends MaterialPageRoute {
  Route(): super(
    builder: (context) {
      return SomeWidget();
    }
  );
}
...somewhere in the build method of another class...
Navigator.push(context, Route())

热重新加载不会像我重新加载时那样重新构建路径内容

...somewhere in the build method of another class...
Navigator.push(context, MaterialPageRoute(
  builder: (context) {
    return SomeWidget();
  }
))

或

class Route extends MaterialPageRoute {
  Route(): super(
    builder: (context) {
      return RouteWidget();
    }
  );
}
class RouteWidget extends StatelessWidget {
  Widget build(BuildContext context) {
    return SomeWidget();
  }
}
...somewhere in the build method of another class...
Navigator.push(context, Route())

我发现特别奇怪的是，最后的变通方法是有效的。知道我错过了什么吗？文档中说，热重新加载将重新构建所有小部件。

Answer 1

热重新加载将应用代码更改并重新运行build()，以便更新视图。要重新加载路由，需要热重新启动。

有关热重新加载的更多详细信息，请参阅：https://flutter.io/docs/development/tools/hot-reload