Flutter 是否可以在不创建新状态的情况下推送已经初始化的页面？

Question

final myPage = new MyPage(); 

Navigator.of(context).push(MaterialPageRoute(
                  builder: (BuildContext context) => myPage));

每次将 myPage 推送到 MaterialPageRoute 时，我都需要不要创建新状态。

Answer 1

主 channel 有点问题，但是 here你去。

class PersistantTab extends StatefulWidget {
  @override
  _PersistantTabState createState() => _PersistantTabState();
}

class _PersistantTabState extends State<PersistantTab> with AutomaticKeepAliveClientMixin {
  @override
  Widget build(BuildContext context) {
    return Container();
  }

  // Setting to true will force the tab to never be disposed. This could be dangerous.
  @override
  bool get wantKeepAlive => true;
}