fix：比赛页面新增设备已离线弹窗提示

src/pages/melee-battle.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { ref, onMounted, onBeforeUnmount } from "vue";
+import { ref, onMounted, onBeforeUnmount, watch } from "vue";
 import { onLoad, onShow, onHide } from "@dcloudio/uni-app";
 import Container from "@/components/Container.vue";
 import BowTarget from "@/components/BowTarget.vue";
@@ -10,13 +10,14 @@ import SButton from "@/components/SButton.vue";
 import Avatar from "@/components/Avatar.vue";
 import ScreenHint from "@/components/ScreenHint.vue";
 import TestDistance from "@/components/TestDistance.vue";
+import SModal from "@/components/SModal.vue";
 import audioManager from "@/audioManager";
 import { getBattleAPI, laserCloseAPI } from "@/apis";
 import { MESSAGETYPESV2 } from "@/constants";
 import useStore from "@/store";
 import { storeToRefs } from "pinia";
 const store = useStore();
-const { user } = storeToRefs(store);
+const { user, online } = storeToRefs(store);
 const title = ref("");
 const start = ref(null);
 const battleId = ref("");
@@ -29,6 +30,17 @@ const playersSorted = ref([]);
 const playersScores = ref([]);
 const halfTimeTip = ref(false);
 const halfRest = ref(false);
+/** 控制设备离线提示弹窗的显示状态 */
+const showOfflineModal = ref(false);
+
+/**
+ * 监听设备在线状态，大乱斗比赛进行中设备离线时弹窗提示用户
+ */
+watch(online, (newVal, oldVal) => {
+  if (!newVal && oldVal && start.value === true) {
+    showOfflineModal.value = true;
+  }
+});
 
 function recoverData(battleInfo, { force = false } = {}) {
   if (!battleInfo) return;
@@ -208,6 +220,19 @@ onShow(async () => {
           <text>20秒后开始下半场</text>
         </view>
       </ScreenHint>
+      <!-- 设备离线提示弹窗 -->
+      <SModal
+        :show="showOfflineModal"
+        :noBg="true"
+        height="360rpx"
+        :onClose="() => (showOfflineModal = false)"
+      >
+        <view class="offline-modal">
+          <text class="offline-title">设备已离线</text>
+          <text class="offline-desc">检测到设备已断开连接，请检查设备后继续比赛</text>
+          <SButton @click="showOfflineModal = false">我知道了</SButton>
+        </view>
+      </SModal>
     </view>
   </Container>
 </template>
@@ -217,4 +242,25 @@ onShow(async () => {
   width: 100%;
   height: 100%;
 }
+
+.offline-modal {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  padding: 60rpx 40rpx 40rpx;
+  gap: 24rpx;
+}
+
+.offline-title {
+  font-size: 36rpx;
+  font-weight: bold;
+  color: #FED847;
+}
+
+.offline-desc {
+  font-size: 28rpx;
+  color: #CCCCCC;
+  text-align: center;
+  line-height: 1.6;
+}
 </style>