update

src/components/pages/pptEasy/addCourse3.vue

@@ -1689,7 +1689,7 @@ export default {
           _pptIframe.contentWindow.window &&
           typeof _pptIframe.contentWindow.window.exportJSON === "function"
         ) {
-          let _data = _pptIframe.contentWindow.window.imgExporting;
+          let _data = _pptIframe.contentWindow.window.imgExporting();
           resolve(_data);
         } else {
           // 递归等待1000ms后重试