fix: #656

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/video/detail/widgets/header_control.dart

@@ -189,8 +189,10 @@ class HeaderControlState extends State<HeaderControl> {
                 ),
               ListTile(
                 dense: true,
-                onTap: () =>
-                    {Get.back(), Utils.scheduleExit(context, isFullScreen)},
+                onTap: () => {
+                  Get.back(),
+                  Utils.scheduleExit(this.context, isFullScreen)
+                },
                 leading: const Icon(Icons.hourglass_top_outlined, size: 20),
                 title: const Text('定时关闭', style: titleStyle),
               ),

lib/utils/utils.dart

@@ -104,7 +104,11 @@ class Utils {
   }
 
   /// 定时关闭
-  static void scheduleExit(context, isFullScreen, [bool isLive = false]) {
+  static void scheduleExit(BuildContext context, isFullScreen,
+      [bool isLive = false]) {
+    if (!context.mounted) {
+      return;
+    }
     const List<int> scheduleTimeChoices = [0, 15, 30, 45, 60];
     const TextStyle titleStyle = TextStyle(fontSize: 14);
     if (isLive) {
@@ -567,6 +571,9 @@ class Utils {
     required Function isFullScreen,
     double? padding,
   }) {
+    if (!context.mounted) {
+      return;
+    }
     Get.generalDialog(
       barrierLabel: '',
       barrierDismissible: true,