Flutter/Dart - 导航回带有文本字段的表单时如何保存 State？

Question

Currently, when a user fills in a TextField the text is lost if they navigate away and then return. How can I get the text to stay in the field upon their return?

Here's the stateful widget I'm using;

  class _EditPageState extends State<EditPage> {

  final _formKey = GlobalKey<FormState>();
  String audiotitle;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Form(
        key: _formKey,
        child: Container(
          child: TextField(      
            decoration: new InputDecoration(
              hintText: widget.oldaudiotitle,           
            ),
            keyboardType: TextInputType.text,
            onChanged: (titleText) {
              setState(() {
                this.audiotitle = titleText;
              });
            },
          ),
        ),
      ),
    );
  }
}

What am I doing wrong here?

Answer 1

you have two ways:

1. store the Data of the text field and set the data in init method (use sharedpreferences or any other database as per your requirements)

 TextEditingController controller = TextEditingController(); @override void initState() { // TODO: implement initState // retrive the Data if(data:= null) { controller = new TextEditingController(text; data); } }

or if the first screen is navigating in the second Screen than just pop that screen

 Navigator.pop(context);