助记词转换

lib/views/public/transit_page.dart

@@ -15,12 +15,24 @@ class TransitPage extends StatefulWidget {
 
 /// 这里的加载图片，应该是可以请求网络图片的，但是要考虑网络图片的加载周期，还有网络环境因素等
 class _TransitPageState extends State<TransitPage> {
-  final int _leftTime = 5;
+  int _leftTime = 5;
   late Timer _timer;
 
   @override
   void initState() {
     super.initState();
+
+    _timer = Timer.periodic(const Duration(seconds: 1), (Timer timer) {
+      if (mounted) {
+        setState(() {
+          _leftTime--;
+        });
+      }
+      if (_leftTime <= 0) {
+        timer.cancel();
+        _jumpToRootPage();
+      }
+    });
   }
 
   void _jumpToRootPage() {