flutter_search_bar 定义两个数据列表,一个原始,一个显示 List<RoleModel> roles = List<RoleModel>(); List<RoleModel> showRoles = List<RoleModel>(); 简单的本地搜索匹配 void _onSearch(String search) { print('_onSearch:${search}'); showRoles.clear(); if (search.isEmpty) { roles.forEach...
This example filter list of strings with condition list strings that stars with one letter This example usesList.where()based on the conditional predicate. voidmain() {varwords=['one','two','three'];List<String> result=words.where((f) => f.startsWith('t')).toList();print(result);}...
void _runFilter(String enteredKeyword) { List<Map<String, dynamic>> results = []; if (enteredKeyword.isEmpty) { // if the search field is empty or only contains white-space, we'll display all users results = _allUsers; } else { results = _allUsers .where((user) => user["name"...
dynamic>> _foundUsers = [];@overrideinitState() {// at the beginning, all users are shown_foundUsers = _allUsers;super.initState();}// This function is called whenever the text field changesvoid _runFilter(String enteredKeyword) {List<Map<String, dynamic>> results = [];if (enteredKeywo...
这里list后用了…add(),还会返回list,然后就一直使用…语法,能一直想list里增加widget元素。 最后我们调用了一些父类的initState()方法。 BottomNavigationBar里的响应事件 BottomNavigationBar组件里提供了一个相应事件onTap,这个事件自带一个索引值index,通过索引值我们就可以和我们list里的索引值相对应了。 onTap:(...
dropdown_search 用于让用户搜索在单个或多个选择列表中显示在对话框或菜单中的下拉列表。 2022-09-22 1104 extended_nested_scroll_view 扩展的嵌套滚动视图。 2022-07-01 152 drag_select_grid_view 一个同时支持拖动和点击以选择其项目的网格。 2022-07-24 106 sticky_infinite_list 具有粘性标头的无限列表。
showSearch 是直接跳转到搜索页面,用法如下: showSearch(context: context, delegate: CustomSearchDelegate()); class CustomSearchDelegate extends SearchDelegate{ @override ListbuildActions(BuildContext context) { return null; } @override Widget buildLeading(BuildContext context) { ...
showSearch 是直接跳转到搜索页面,用法如下: showSearch(context: context, delegate: CustomSearchDelegate()); class CustomSearchDelegate extends SearchDelegate<String>{ @override List<Widget> buildActions(BuildContext context) { return null; } @override ...
Create a function and call FilterListDelegate.open() on button tap. void openFilterDelegate() async { await FilterListDelegate.open<User>( context: context, list: userList, onItemSearch: (user, query) { return user.name!.toLowerCase().contains(query.toLowerCase()); }, tileLabel: (user...
final characters = FutureProvider.autoDispose.family<List<Character>, String>((ref, filter) async { returnfetchCharacters(filter: filter); }); 给family传递多重参数 family没有内置支持向一个Provider传递多个值的方法。另一方面,这个值可以是任何东西(只要它符合前面提到的限制)。