doctor_app_flutter/lib/screens/base/base_view.dart

import 'package:doctor_app_flutter/core/viewModel/base_view_model.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

import '../../locator.dart';

class BaseView<T extends BaseViewModel> extends StatefulWidget {
  final Widget Function(BuildContext context, T model, Widget child) builder;
  final Function(T) onModelReady;

  BaseView({
    this.builder,
    this.onModelReady,
  });

  @override
  _BaseViewState<T> createState() => _BaseViewState<T>();
}

class _BaseViewState<T extends BaseViewModel> extends State<BaseView<T>> {
  T model = locator<T>();

  bool isLogin = false;

  @override
  void initState() {
    if (widget.onModelReady != null) {
      widget.onModelReady(model);
    }

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider<T>.value(
      value: model,
      child: Consumer<T>(builder: widget.builder),
    );
  }

  @override
  void dispose() {
    if (model != null) {
      model = null;
    }

    super.dispose();
  }
}