iframe中无法拖拽的bug

one_stop_public/libs/PictureSignature/ShowItem.js

@@ -49,7 +49,9 @@ const ShowItem = ({ basicUrl, type, x, y, ...otherInfo }) => {
 
 export const dragEventList = (setOtherProps, otherProps) => {
   let draggedRef = null;
-  document.addEventListener(
+  let documentThis = window?.parent?.iframeParentComponent?.Modal ? window?.parent?.document : document;
+
+  documentThis.addEventListener(
     'dragstart',
     function(event) {
       // 保存拖动元素的引用(ref.)
@@ -58,7 +60,7 @@ export const dragEventList = (setOtherProps, otherProps) => {
     },
     false,
   );
-  document.addEventListener(
+  documentThis.addEventListener(
     'dragend',
     (event) => {
       // 重置透明度
@@ -68,7 +70,7 @@ export const dragEventList = (setOtherProps, otherProps) => {
   );
 
   /* 放下目标节点时触发事件 */
-  document.addEventListener(
+  documentThis.addEventListener(
     'dragover',
     (event) => {
       // 阻止默认动作
@@ -76,13 +78,13 @@ export const dragEventList = (setOtherProps, otherProps) => {
     },
     false,
   );
-  document.addEventListener(
+  documentThis.addEventListener(
     'drop',
     (event) => {
       // 阻止默认动作（如打开一些元素的链接）
       event.preventDefault();
       // 将拖动的元素到所选择的放置目标节点中
-      let infoClientRect = document.getElementById('dropZone').getBoundingClientRect();
+      let infoClientRect = documentThis.getElementById('dropZone').getBoundingClientRect();
       let leftNew = Math.ceil(event.clientX - infoClientRect.left);
       let topNew = Math.ceil(event.clientY - infoClientRect.top);
       if(leftNew < 0 || leftNew > infoClientRect.width || topNew < 0 || topNew > infoClientRect.height){