can't pass userdata through SearchDelegate class in flutter

发布于 2020-11-29 08:16:36

In my search page, I have userdata class/object (including username, useraddress, etc) that I want to get from the former page and then pass to the next page, but my Search page doesn't pass userdata class/object to the next page. In order to make it work, I wrote the same code as I did with typical StatelessWidgetlike below, but failed. In this search page, how can I get userdata from the former page and then pass it to the next page? Here is my code. In the former page(statefulWidget), I made an iconButton to go to the search page like this;

  IconButton(icon: Icon(Icons.search),
           onPressed: () async {await showSearch(context: context, 
           delegate: DataSearch(***userdata: userdata***));
                            })

And then, I made DataSearch class to implement search on a page;

  class DataSearch extends SearchDelegate<String> {
   ***final Userdata userdata;
    DataSearch({this.userdata});***

   @override
   List<Widget> buildActions(BuildContext context) {
       return   ...     }

   @override
   Widget buildLeading(BuildContext context) {
   return    ...      }

   @override
   Widget buildResults(BuildContext context) {
         ...         }

   @override
   Widget buildSuggestions(BuildContext context) {
     return ListView(
            .....
            onTap: () async {
              if (afields.contains(e)) {
                await Navigator.push(context,
                    MaterialPageRoute(builder: (context) => 
                      NextPage(***userdata: userdata***)));}

Questioner

kyung

Viewed

Original

//part of statefulWidget class _DataSearchState extends State<DataSearch> { TextEditingController _searchController = TextEditingController(); @override void initState() { super.initState(); _searchController.addListener(_onSearchChanged); } @override void dispose() { _searchController.removeListener(_onSearchChanged); _searchController.dispose(); super.dispose(); } Widget build(BuildContext context) { return Scaffold( body: Column( children: [ TextField( controller: _searchController, decoration: InputDecoration(prefixIcon: Icon(Icons.search)), ), ), ListView.builder( itemCount: resultsList.length, itemBuilder: (BuildContext context, int ndx) { return ListTile( title: Text(resultsList[ndx]), onTap: () { Navigator.push(context, MaterialPageRoute(builder: (context) => NextPage(userdata: userdata))); }); } }

can't pass userdata through SearchDelegate class in flutter

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