ActivePage.dart

/*
 * @author lsy
 * @date   2020/6/4
 **/
import 'package:flutter/cupertino.dart';

class ActivePage extends StatefulWidget {
  Widget child;

  ActivePage(this.child);

  @override
  State<StatefulWidget> createState() {
    return ActiveState();
  }
}

class ActiveState extends State<ActivePage> with AutomaticKeepAliveClientMixin {
  @override
  bool get wantKeepAlive => true;

  @override
  Widget build(BuildContext context) {
    return widget.child;
  }
}