opt: 字幕按钮显隐逻辑

lib/pages/video/detail/controller.dart

@@ -141,13 +141,7 @@ class VideoDetailController extends GetxController
     if (Platform.isAndroid) {
       floating = Floating();
     }
-    headerControl = HeaderControl(
+
-      controller: plPlayerController,
-      videoDetailCtr: this,
-      floating: floating,
-      bvid: bvid,
-      videoType: videoType,
-    );
     // CDN优化
     enableCDN = setting.get(SettingBoxKey.enableCDN, defaultValue: true);
     // 预设的画质
@@ -158,7 +152,18 @@ class VideoDetailController extends GetxController
     defaultAudioQa = setting.get(SettingBoxKey.defaultAudioQa,
         defaultValue: AudioQuality.hiRes.code);
     oid.value = IdUtils.bv2av(Get.parameters['bvid']!);
-    getSubtitle();
+    getSubtitle().then(
+      (subtitles) {
+        headerControl = HeaderControl(
+          controller: plPlayerController,
+          videoDetailCtr: this,
+          floating: floating,
+          bvid: bvid,
+          videoType: videoType,
+          showSubtitleBtn: subtitles.isNotEmpty,
+        );
+      },
+    );
   }
 
   showReplyReplyPanel(oid, fRpid, firstFloor, currentReply, loadMore) {
@@ -432,6 +437,14 @@ class VideoDetailController extends GetxController
     if (result['status']) {
       if (result['data'].subtitles.isNotEmpty) {
         subtitles = result['data'].subtitles;
+        getDanmaku(subtitles);
+      }
+      return subtitles;
+    }
+  }
+
+  // 获取弹幕
+  Future getDanmaku(List subtitles) async {
     if (subtitles.isNotEmpty) {
       for (var i in subtitles) {
         final Map<String, dynamic> res = await VideoHttp.getSubtitleContent(
@@ -442,9 +455,6 @@ class VideoDetailController extends GetxController
       }
     }
   }
-      return result['data'];
-    }
-  }
 
   setSubtitleContent() {
     plPlayerController.subtitleContent.value = '';

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

@@ -30,6 +30,7 @@ class HeaderControl extends StatefulWidget implements PreferredSizeWidget {
     this.floating,
     this.bvid,
     this.videoType,
+    this.showSubtitleBtn,
     super.key,
   });
   final PlPlayerController? controller;
@@ -37,6 +38,7 @@ class HeaderControl extends StatefulWidget implements PreferredSizeWidget {
   final Floating? floating;
   final String? bvid;
   final SearchType? videoType;
+  final bool? showSubtitleBtn;
 
   @override
   State<HeaderControl> createState() => _HeaderControlState();
@@ -1327,6 +1329,7 @@ class _HeaderControlState extends State<HeaderControl> {
           ],
 
           /// 字幕
+          if (widget.showSubtitleBtn!)
             ComBtn(
               icon: const Icon(
                 Icons.closed_caption_off,