Adds the start of a new sample showcasing Cupertino widgets. (#12)

veggieseasons/lib/screens/details.dart

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+// Copyright 2018 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/widgets.dart';
+import 'package:veggieseasons/styles.dart';
+
+class DetailsScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      navigationBar: CupertinoNavigationBar(
+        middle: Text('Details'),
+      ),
+      backgroundColor: Styles.scaffoldBackground,
+      child: Center(
+        child: Text('Not yet implemented.'),
+      ),
+    );
+  }
+}

veggieseasons/lib/screens/favorites.dart

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+// Copyright 2018 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/widgets.dart';
+import 'package:veggieseasons/styles.dart';
+
+class FavoritesScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      navigationBar: CupertinoNavigationBar(
+        middle: Text('My Garden'),
+      ),
+      backgroundColor: Styles.scaffoldBackground,
+      child: Center(
+        child: Text('Not yet implemented.'),
+      ),
+    );
+  }
+}

veggieseasons/lib/screens/home.dart

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+// Copyright 2018 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/widgets.dart';
+import 'package:veggieseasons/screens/favorites.dart';
+import 'package:veggieseasons/screens/list.dart';
+import 'package:veggieseasons/screens/search.dart';
+import 'package:veggieseasons/screens/settings.dart';
+
+class HomeScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoTabScaffold(
+      tabBar: CupertinoTabBar(items: [
+        BottomNavigationBarItem(
+          icon: Icon(CupertinoIcons.home),
+          title: Text('Home'),
+        ),
+        BottomNavigationBarItem(
+          icon: Icon(CupertinoIcons.book),
+          title: Text('My Garden'),
+        ),
+        BottomNavigationBarItem(
+          icon: Icon(CupertinoIcons.search),
+          title: Text('Search'),
+        ),
+        BottomNavigationBarItem(
+          icon: Icon(CupertinoIcons.settings),
+          title: Text('Settings'),
+        ),
+      ]),
+      tabBuilder: (context, index) {
+        if (index == 0) {
+          return ListScreen();
+        } else if (index == 1) {
+          return FavoritesScreen();
+        } else if (index == 2) {
+          return SearchScreen();
+        } else {
+          return SettingsScreen();
+        }
+      },
+    );
+  }
+}

veggieseasons/lib/screens/list.dart

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+// Copyright 2018 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/widgets.dart';
+import 'package:veggieseasons/styles.dart';
+
+class ListScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      navigationBar: CupertinoNavigationBar(
+        middle: Text('List'),
+      ),
+      backgroundColor: Styles.scaffoldBackground,
+      child: Center(
+        child: Text('Not yet implemented.'),
+      ),
+    );
+  }
+}

veggieseasons/lib/screens/search.dart

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+// Copyright 2018 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/widgets.dart';
+import 'package:veggieseasons/styles.dart';
+
+class SearchScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      navigationBar: CupertinoNavigationBar(
+        middle: Text('Search'),
+      ),
+      backgroundColor: Styles.scaffoldBackground,
+      child: Center(
+        child: Text('Not yet implemented.'),
+      ),
+    );
+  }
+}

veggieseasons/lib/screens/settings.dart

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+// Copyright 2018 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/widgets.dart';
+import 'package:veggieseasons/styles.dart';
+
+class SettingsScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      navigationBar: CupertinoNavigationBar(
+        middle: Text('Settings'),
+      ),
+      backgroundColor: Styles.scaffoldBackground,
+      child: Center(
+        child: Text('Not yet implemented.'),
+      ),
+    );
+  }
+}