使用Bloc管理动态表单

Question

我有以下代码。该代码可以动态地在屏幕上添加和删除表单。我现在将此代码更改为Bloc模式。我的问题在这里，我正在添加包含2个文本字段且处于设置状态的用户窗体。如何将此逻辑移至Bloc区域。

  ///on form user deleted
  void onDelete(User _user) {
    setState(() {
      var find = users.firstWhere(
        (it) => it.user == _user,
        orElse: () => null,
      );
      if (find != null) users.removeAt(users.indexOf(find));
    });
  }

  ///on add form
  void onAddForm() {
    setState(() {
      var _user = User();
      users.add(UserForm(
        user: _user,
        onDelete: () => onDelete(_user),
      ));
    });
  }

用户表格如下。 这是我的form.dart文件，我在其中处理文本框

class UserForm extends StatefulWidget {
  final User user;
  final state = _UserFormState();
  final OnDelete onDelete;

  UserForm({Key key, this.user, this.onDelete}) : super(key: key);
  @override
  _UserFormState createState() => state;

  bool isValid() => state.validate();
}


class _UserFormState extends State<UserForm> {
  final form = GlobalKey<FormState>();

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: EdgeInsets.all(16),
      child: Material(
        elevation: 1,
        clipBehavior: Clip.antiAlias,
        borderRadius: BorderRadius.circular(8),
        child: Form(
          key: form,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              AppBar(
                leading: Icon(Icons.verified_user),
                elevation: 0,
                title: Text('User Details'),
                backgroundColor: Theme.of(context).accentColor,
                centerTitle: true,
                actions: <Widget>[
                  IconButton(
                    icon: Icon(Icons.delete),
                    onPressed: widget.onDelete,
                  )
                ],
              ),
              Padding(
                padding: EdgeInsets.only(left: 16, right: 16, top: 16),
                child: TextFormField(
                  initialValue: widget.user.fullName,
                  onSaved: (val) => widget.user.fullName = val,
                  validator: (val) =>
                      val.length > 3 ? null : 'Full name is invalid',
                  decoration: InputDecoration(
                    labelText: 'Full Name',
                    hintText: 'Enter your full name',
                    icon: Icon(Icons.person),
                    isDense: true,
                  ),
                ),
              ),
              Padding(
                padding: EdgeInsets.only(left: 16, right: 16, bottom: 24),
                child: TextFormField(
                  initialValue: widget.user.email,
                  onSaved: (val) => widget.user.email = val,
                  validator: (val) =>
                      val.contains('@') ? null : 'Email is invalid',
                  decoration: InputDecoration(
                    labelText: 'Email Address',
                    hintText: 'Enter your email',
                    icon: Icon(Icons.email),
                    isDense: true,
                  ),
                ),
              )
            ],
          ),
        ),
      ),
    );
  }