update

src/components/home/NavList.vue

@@ -1,7 +1,11 @@
 <template>
   <div class="app-card" >
     <div style="display: flex;flex-direction: row;align-items: center" @click="goToNavDetail">
-      <el-image v-if="nav.icon" :src="nav.icon" style="width: 30px;height: 30px"></el-image>
+      <el-image v-if="nav.icon" :src="nav.icon" style="width: 30px;height: 30px">
+        <div slot="error" class="image-slot">
+          <img style="width: 30px" :src="require('@/assets/img/null.png')" alt="图标">
+        </div>
+      </el-image>
       <div class="content-card">
 
         <el-tooltip v-if="nav.name" class="item" effect="dark" :content="nav.name" placement="top">