样式加载异常

src/components/app-mob-recorder/app-mob-recorder.vue

@@ -558,9 +558,11 @@ export default class AppMobRecorder extends Vue {
     public changeLabelStyle() {
         document.querySelectorAll(".app-mobile-picture").forEach((element: any) => {
             let prev = this.getNearEle(element, 1);
+            if (prev) {
                 prev.style.transform = 'none';
                 prev.style.marginBottom = "10px";
-      })
+            }
+        });
     }
 
     /**