如何在 TextFormField 中显示输入时间？

Question

我想制作一个表格，以便用户可以输入约会的日期和时间。 我尝试了一些选项，但只有日期有效（它显示用户的输入），但即使出现 TimePicker 并且他可以选择他想要的时间，时间仍然是空的。我该如何解决这个问题？

TextEditingController dateCtl = TextEditingController();

class MyCustomFormState extends State<MyCustomForm> {
final _formKey = GlobalKey<FormState>();
DateTime date = DateTime.now();
@override
Widget build(BuildContext context) {
String _formattedate = new DateFormat.yMMMMEEEEd().format(date);
return Form(
  key: _formKey,
  child: Column(
    crossAxisAlignment: CrossAxisAlignment.start,
    children: <Widget>[
      Padding(
        padding: const EdgeInsets.only(left: 15, right: 15, bottom: 20),
        child: TextFormField(
          controller: dateCtl,
          decoration: InputDecoration(labelText: 'Date*'),
          onTap: () async {
            FocusScope.of(context).requestFocus(new FocusNode());

            DateTime picked = await showDatePicker(
                context: context,
                initialDate: DateTime.now(),
                firstDate: DateTime(2020),
                lastDate: DateTime(2021));
            dateCtl.text = _formattedate.toString();
            if(picked != null && picked != date){
              setState(() {
                date = picked;
              });
            }
          },
          validator: (value) {
            if (value.isEmpty) {
              return 'cant be empty';
            }
            return null;
          },
        ),
      ),
      Padding(
        padding: const EdgeInsets.only(left: 15, right: 15, bottom: 20),
        child: TextFormField(
          decoration: InputDecoration(
            labelText: 'time*',
          ),
          onTap: () async {
            TimeOfDay time = TimeOfDay.now();
            FocusScope.of(context).requestFocus(new FocusNode());

            TimeOfDay picked =
                await showTimePicker(context: context, initialTime: time);
            if (picked != null && picked != time)
              setState(() {
                time = picked;
              });
          },
          validator: (value) {
            if (value.isEmpty) {
              return 'cant be empty';
            }
            return null;
          },
        ),
      ),
    //more code

Answer 1

在 dateCtl 下添加这一行。

TextEditingController timeCtl = TextEditingController();

并添加 2 行。

child: TextFormField(
  controller: timeCtl,  // add this line.
  decoration: InputDecoration(
    labelText: 'time*',
  ),
  onTap: () async {
    TimeOfDay time = TimeOfDay.now();
    FocusScope.of(context).requestFocus(new FocusNode());

    TimeOfDay picked =
        await showTimePicker(context: context, initialTime: time);
    if (picked != null && picked != time) {
      timeCtl.text = picked.toString();  // add this line.
      setState(() {
        time = picked;
      });
    }
  },
  validator: (value) {
    if (value.isEmpty) {
      return 'cant be empty';
    }
    return null;
  },
),

格式前 1

timeCtl.text = picked.format(context);

前 2

var now = DateTime.now();
var dt = DateTime(now.year, now.month, now.day, picked.hour, picked.minute);
String _formattetime = DateFormat.Hm().format(dt);
timeCtl.text = _formattetime;