fix:1.解决了点击查看后，图标右上角数字不变化的问题 2.发现了代码中将message和announcement混淆的情况

src/components/GlobalHeader.vue

@@ -121,7 +121,9 @@ export default {
       return this.$store.getters.unReadAnnouncements;
     },
     unreadNum() {
-      return this.unReadAnnouncements.length + this.unReadMessages.length > 99 ? "99+" : this.unReadAnnouncements.length + this.unReadMessages.length + "";
+      const x = this.unReadAnnouncements === undefined ? 0 : this.unReadAnnouncements.length;
+      const y = this.unReadMessages === undefined ? 0 : this.unReadMessages.length;
+      return x + y > 99 ? "99+" : x + y + "";
     },
   },
 

src/store/modules/message.js

@@ -17,8 +17,8 @@ const messages = {
 
   actions: {
     async fetchMessages({commit, state}, that) {
-      commit("set_messages", (await that.$apis.getUnreadAnnouncements()).data.data);
-      commit("set_announcements", (await that.$apis.getUnreadMessages()).data.data);
+      commit("set_messages", (await that.$apis.getUnreadMessages()).data.data);
+      commit("set_announcements", (await that.$apis.getUnreadAnnouncements()).data.data);
     }
   },