样式加载异常

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

@@ -556,11 +556,13 @@ export default class AppMobRecorder extends Vue {
      * @memberof AppMobRecorder
      */
     public changeLabelStyle() {
-      document.querySelectorAll(".app-mobile-picture").forEach((element: any) => {
-        let prev = this.getNearEle(element, 1);
-        prev.style.transform = 'none';
-        prev.style.marginBottom = "10px";
-      })
+        document.querySelectorAll(".app-mobile-picture").forEach((element: any) => {
+            let prev = this.getNearEle(element, 1);
+            if (prev) {
+                prev.style.transform = 'none';
+                prev.style.marginBottom = "10px";
+            }
+        });
     }
 
     /**