( onRefresh: _onRefresh, child: ListView.builder( itemCount: _listData.length+1, //增加了一个上拉加载更多的指示 itemBuilder: (BuildContext context, int index) { if (index == _listData.length) { return _buildProgressMoreIndicator(); } else { return getItem(context,index); } }, ...
}void_onScroll() {// 检测是否滚动到底部if(_scrollController.position.pixels >=// scrollController.position.maxScrollExtent:表示可滚动区域的最大值_scrollController.position.maxScrollExtent &&// scrollController.position.maxScrollExtent:表示可滚动区域的最大值!_isLoadingMore && _hasMore) { _loadMore();...
如果是要在用户滚动到列表底部时自动加载更多项目的场景,我们需要使用NotificationListener<ScrollNotification>。 为此,我们需要将ListView.builder包装在NotificationListener<ScrollNotification>中: 我们的代码大致如下: NotificationListener<ScrollNotification>( onNotification: (ScrollNotification scrollInfo) { if (scrollInfo...
Next, every time we scroll near the bottom of the ListView, a function named _loadMore will be called and this function will load 20 more posts. Advertisements After all the posts from the API have been loaded, a message will appear letting us know that even if we scroll down, nothing ...
思路是得到滑动的偏移量,跟ListView总的高度进行比对。那么得得到滑动的偏移量和ListView的总高度这两个值,在源码里面找了很久后,发现根本得不到ListView的内容高度。只能自己计算。但是发现了另一个数据。ScrollController里面有一个mostRecentlyUpdatePosition,这个对象的maxScrollExtent是可以滑动的最大距离,当滑动到底部的...
find(tag: tag); return GetBuilder<C>(builder: (controller) { return buildRefreshWidget( builder: () => buildListView<T>( data: controller.pagingState.data, separatorBuilder: separatorBuilder, itemBuilder: itemBuilder, onItemClick: onItemClick, physics: physics, shrinkWrap: shrinkWrap, scroll...
{ return MaterialApp( home: Scaffold( appBar: AppBar( title: Text('Refresh & Load More Example'), ), body: RefreshIndicator( onRefresh: refreshList, child: ListView.builder( itemCount: items.length, itemBuilder: (context, index) { return ListTile( title: Text(items[index]), ); }, ),...
使用ListView展示静态数据时,首先定义数据源,然后将数据源绑定到ListView。下面是一个简单的例子,展示一个静态的姓名列表: import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override
: IndicatorStatus.LoadingMoreBusying; if (preStatus == IndicatorStatus.Error) { onStateChanged(this); } isLoading = true; var isSuccess = await loadData(); isLoading = false; if (isSuccess) { if (this.length == 0) indicatorStatus = IndicatorStatus.Empty; ...
tristanzeng/flutter_load_more_demoPublic NotificationsYou must be signed in to change notification settings Fork0 Star2 master 1Branch0Tags Code README 基础方式 Flutter关于加载更多最基本也是最简单的一种实现方式是:判断当ListView的构造器在开始构造最后一条布局的时候,将此布局替换为“加载更多”的布局。