优化底部三个菜单点击报错拦截

pages/rtcEngine/rtc.vue

@@ -424,8 +424,12 @@ export default {
     },
     // 三键
     sendKey (keyCode) {
-      console.log('sendKey', keyCode);
-      this.engine.sendKey(keyCode);
+      try {
+        console.log('sendKey', keyCode);
+        this.engine?.sendKey(keyCode);
+      } catch (error) {
+        console.log('sendKey error', error);
+      }
     }
   }
 }