flutter中的SmartRefresher错误(不要使用一个refreshController对应多个SmartRefresher，这会导致一些意想不到的错误)

import 'package:flutter/material.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';

class MyWidget extends StatelessWidget {
  RefreshController _refreshController =
      RefreshController(initialRefresh: false);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('SmartRefresher Example'),
      ),
      body: SmartRefresher(
        controller: _refreshController,
        onRefresh: _onRefresh,
        onLoading: _onLoading,
        child: ListView(
          children: <Widget>[
            // 列表项
          ],
        ),
      ),
    );
  }

  void _onRefresh() {
    // 刷新操作
    // ...

    _refreshController.refreshCompleted();
  }

  void _onLoading() {
    // 加载更多操作
    // ...

    _refreshController.loadComplete();
  }
}