我有一个非常简单的SearchApp,其中有一个带有搜索图标和文本小部件的AppBar。轻按搜索图标后,将调用showSearch并调用CustomSearchDelegate。我如何做到这一点,以便在buildResults方法中,无需返回窗口小部件即可立即调用this.close,并将查询传递给SearchApp无状态窗口小部件以在“文本”窗口小部件上显示。
代码如下:
class SearchApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
actions: <Widget>[
IconButton(
tooltip: 'Search',
icon: const Icon(Icons.search),
//Don't block the main thread
onPressed: () {
showSearch(context: context, delegate: CustomSearchDelegate());
},
),
],
),
body: Text(query), // The query data should be displayed here
);
}
}
class CustomSearchDelegate extends SearchDelegate {
@override
List<Widget> buildActions(BuildContext context) {
return <Widget>[Icon(Icons.close)];
}
@override
Widget buildLeading(BuildContext context) {
return Icon(Icons.arrow_back_ios);
}
@override
Widget buildResults(BuildContext context) {
// GO back to SearchApp page immediately with the query result
}
@override
Widget buildSuggestions(BuildContext context) {
return Column();
}
}
答案 0 :(得分:0)
我意识到我可以编辑搜索类的源代码,所以我复制并粘贴了源代码,在Textfield下,我只是删除了showResult方法并用close代替了它,因此不会显示结果页面。至于将查询传递到原始页面,我要做的就是将值存储在异步变量中。