修复sisview显示bug

src/App.vue

@@ -259,7 +259,7 @@ l16.229-16.229l16.229,16.229l42.867-42.867C115.034,45.228,109.133,42.189,102.956
  <login-page  @onLogin="login" />
    </div> -->
  
-  <!-- <sisView v-if="showSisView" /> -->
+  <sisView v-else-if="showSisView" />
 </template>
 
 <script>