相关疑难解决方法(0)

如何实现无限列表视图的延迟加载项？当用户滚动到listview的末尾时,我想通过网络加载更多项目.

我有一个非常简单的Flutter应用程序,带有两个视图的TabBarView(选项卡1和选项卡2),其中一个(选项卡1)有一个带有许多简单文本窗口小部件的ListView,问题是我向下滚动ListView元素后的标签1,如果我刷卡从标签1至标签2,最后我刷卡从 标签2到选项卡1,在ListView控件之前的滚动位置标签1迷路.

这是代码:

import 'package:flutter/material.dart';

void main() {
  runApp(new MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => …