更新页面

lib/controller/time/countdown_controller.dart

@@ -0,0 +1,33 @@
+import 'dart:async';
+import 'package:get/get.dart';
+
+class CountdownController extends GetxController {
+  var countdown = 0.obs;
+  Timer? timer;
+
+  @override
+  void onInit() {
+    super.onInit();
+  }
+
+  void startCountdown(int seconds) {
+    timer?.cancel(); // 取消之前的定时器
+    countdown.value = seconds;
+    timer = Timer.periodic(Duration(seconds: 1), (timer) {
+      int elapsed = timer.tick;
+      int remaining = seconds - elapsed;
+      if (remaining > 0) {
+        countdown.value = remaining;
+      } else {
+        countdown.value = 0;
+        timer.cancel();
+      }
+    });
+  }
+
+  @override
+  void onClose() {
+    timer?.cancel();
+    super.onClose();
+  }
+}