diff --git a/src/i18n/zh-CN/index.ts b/src/i18n/zh-CN/index.ts
index 90e156e..011657a 100644
--- a/src/i18n/zh-CN/index.ts
+++ b/src/i18n/zh-CN/index.ts
@@ -471,4 +471,7 @@ export default {
   CN_BERWEEN_SUFFIX: "之间",
   "full screen": "全屏",
   "exit full screen": "退出全屏",
+  "on the iPad, only Safari supports full screen":
+    "在iPad上, 只有Safari浏览器支持全屏",
+  "the current browser does not support full screen": "当前浏览器不支持全屏",
 };
diff --git a/src/pad/TopToolbar.vue b/src/pad/TopToolbar.vue
index 201a743..92c36ca 100644
--- a/src/pad/TopToolbar.vue
+++ b/src/pad/TopToolbar.vue
@@ -24,6 +24,7 @@
     />
     <q-btn
       class="col-auto"
+      v-if="true || $q.fullscreen.isCapable"
       :class="$store.state.landspace ? 'q-mx-sm' : ''"
       stretch
       stack
@@ -151,10 +152,32 @@ export default defineComponent({
       plan_running,
 
       toogleFullScreen() {
+        if (!$q.fullscreen.isCapable) {
+          if ($q.platform.is.ipad) {
+            $q.notify({
+              type: "warning",
+              message:
+                $t.t("on the iPad, only Safari supports full screen") + "!",
+              position: "top",
+              timeout: 1500,
+            });
+          } else {
+            $q.notify({
+              type: "warning",
+              message:
+                $t.t("the current browser does not support full screen") + "!",
+              position: "top",
+              timeout: 1500,
+            });
+          }
+          return;
+        }
         if ($q.fullscreen.isActive) {
           $q.fullscreen.exit();
         } else {
-          AppFullscreen.request();
+          AppFullscreen.request().catch((e: any) => {
+            console.log(e);
+          });
         }
       },
     };