StatelessWidget

lib/guess/result_notice.dart

@@ -1,54 +1,27 @@
 import 'package:flutter/material.dart';
 
-class ResultNotice extends StatefulWidget {
+class ResultNotice extends StatelessWidget {
   final Color color;
   final String info;
+  final AnimationController controller;
 
   const ResultNotice({
     Key? key,
     required this.color,
     required this.info,
+    required this.controller,
   }) : super(key: key);
 
-  @override
-  State<ResultNotice> createState() => _ResultNoticeState();
-}
-
-class _ResultNoticeState extends State<ResultNotice> with SingleTickerProviderStateMixin {
-  late AnimationController controller;
-
-  @override
-  void initState() {
-    super.initState();
-    controller = AnimationController(
-      vsync: this,
-      duration: const Duration(milliseconds: 200),
-    );
-    controller.forward();
-  }
-
-  @override
-  void dispose() {
-    controller.dispose();
-    super.dispose();
-  }
-
-  @override
-  void didUpdateWidget(covariant ResultNotice oldWidget) {
-    controller.forward(from: 0);
-    super.didUpdateWidget(oldWidget);
-  }
-
   @override
   Widget build(BuildContext context) {
     return Expanded(
       child: Container(
         alignment: Alignment.center,
-        color: widget.color,
+        color: color,
         child: AnimatedBuilder(
           animation: controller,
           builder: (_, child) => Text(
-            widget.info,
+            info,
             style: TextStyle(
               fontSize: 54 * (controller.value),
               color: Colors.white,