fix:修改直播课分享海报封面取值

src/modules/course-manage/modal/ShareLiveModal.jsx

@@ -109,13 +109,8 @@ class ShareLiveModal extends React.Component {
     switch (type) {
       case 'liveClass': // 直播课
         if (courseMediaVOS && courseMediaVOS.length > 0) {
-          data.courseMediaVOS.map((item, index) => {
-            if (item.contentType === 'COVER') {
-              coverImgSrc = item.mediaUrl;
-            } else {
-              coverImgSrc = 'https://image.xiaomaiketang.com/xm/Yip2YtFDwH.png';
-            }
-          });
+          const coverItem = courseMediaVOS.filter((item) => item.contentType === 'COVER');
+          coverImgSrc = coverItem.length === 0 ? 'https://image.xiaomaiketang.com/xm/Yip2YtFDwH.png' : coverItem[0].mediaUrl;
         } else {
           coverImgSrc = 'https://image.xiaomaiketang.com/xm/Yip2YtFDwH.png';
         }