typedef ClickDelete =Function(int position);//定义删除方法 typedef ClickChange =Function(int position);//定义修改方法 然后点击删除或者修改按钮的时候调用相应方法即可。 到这里item的逻辑就分析完了,接着看怎么调用item并实现相应操作,同样的先看一下完整代码 classListRemovePageextendsStatefulWidget{@override_Li...
代码语言:txt 复制 import 'package:flutter/material.dart'; class MyListView extends StatefulWidget { @override _MyListViewState createState() => _MyListViewState(); } class _MyListViewState extends State<MyListView> { List<String> items = ['Item 1', 'Item 2', 'Item 3']; @override Widget...
_list.insert(index,yourDeletedItem);
FlutterListDragDelete ListView drag delete item UI expanded_sample Expanded Sample Project Getting Started This project is a starting point for a Flutter application. A few resources to get you started if this is your first Flutter project: Lab: Write your first Flutter app Cookbook: Useful Flutte...
void_onItemDelete(Stringid)async{try{varresponse =awaitDynamicService.delete(id);if(response.statusCode ==200) { setState(() { _listItems.removeWhere((element) => element.id == id); }); }else{ _showErrorInfo(this.context, response.statusMessage); ...
@overrideboolshouldRebuild(covariantSliverChildListDelegateoldDelegate){returnchildren!=oldDelegate.children;} 发现了,如果 ListView 的孩子数组没有改变的话 shouldRebuild 就会返回 false,也就不会执行 build 方法了,因此界面也不会有什么变化。可以想象 ListView.builder 里面也有这种方法,不过返回结果应该不一样,去...
List<String>list=["第一条数据","第二条数据"];@overridevoidinitState(){// TODO: implement initStatesuper.initState();}Widget_buildItem(context,index){returnListTile(key:ValueKey(index),title:Text(list[index]),trailing:IconButton(icon:Icon(Icons.delete),// 点击时删除onPressed:()=>_deleteItem...
(value); //2.selectItem,根据不同的trackInfo来确定需要下载哪个清晰度 List<TrackInfoModel> trackInfos = downloadModel.trackInfos; downloader.selectItem(vid,trackInfos[0].index); //3.start downloader.start(vid, trackInfos[0].index).listen((event) { //说明:event可能会有多种信息,...
(value); //2.selectItem,根据不同的trackInfo来确定需要下载哪个清晰度 List<TrackInfoModel> trackInfos = downloadModel.trackInfos; downloader.selectItem(vid,trackInfos[0].index); //3.start downloader.start(vid, trackInfos[0].index).listen((event) { //说明:event可能会有多种信息,可参考Flutter...
}class_AnimationListItemStateextendsState<AnimationListItem>with TickerProviderStateMixin { @override Widget build(BuildContext context) {//TODO: implement buildreturnContainer(); } } 动画流程 声明 //控制器AnimationController lucencyController; AnimationController sizeController;//动画Animation<double>lucencyAn...