6단계 끝

lib/main.dart

@@ -32,6 +32,17 @@ class MyAppState extends ChangeNotifier {
     current = WordPair.random();
     notifyListeners();
   }
+  var favorites = <WordPair>[];
+
+  void toggleFavorite() {
+    if (favorites.contains(current)) {
+      favorites.remove(current);
+    } else {
+      favorites.add(current);
+    }
+    notifyListeners();
+  }
+
 }
 
 class MyHomePage extends StatelessWidget {
@@ -39,14 +50,32 @@ class MyHomePage extends StatelessWidget {
   Widget build(BuildContext context) {
     var appState = context.watch<MyAppState>();
     var pair = appState.current; 
+
+    IconData icon;
+    if (appState.favorites.contains(pair)) {
+      icon = Icons.favorite;
+    } else {
+      icon = Icons.favorite_border;
+    }
+
     return Scaffold(
       body: Center(
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            
             BigCard(pair: pair), 
             SizedBox(height: 10),
+            Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                 ElevatedButton.icon(
+                  onPressed: () {
+                    appState.toggleFavorite();
+                  },
+                  icon: Icon(icon),
+                  label: Text('Like'),
+                ),
+                 SizedBox(width: 10),
                 ElevatedButton(
                   onPressed: () {
                     appState.getNext();
@@ -55,6 +84,8 @@ class MyHomePage extends StatelessWidget {
                 ),
               ],
             ),
+          ],
+        ),
       ),
     );
   }