fix: 完善表单设计器上传图片功能。

src/components/VueFormMaking/components/Upload/index.vue

@@ -219,8 +219,13 @@ export default {
       xhr.onreadystatechange = () => {
         if (xhr.readyState === 4) {
           const resData = JSON.parse(xhr.response)
-          resData.url = resData.data
-          if (resData && resData.url) {
+          var uploadUrl = ''
+          if (resData.url !== undefined && resData.url !== null && resData.url !== '') {
+            uploadUrl = resData.url
+          } else if (resData.data !== undefined && resData.data !== null && resData.data !== '') {
+            uploadUrl = resData.data
+          }
+          if (resData && uploadUrl) {
             this.$set(this.fileList, this.fileList.findIndex(item => item.key === key), {
               ...this.fileList[this.fileList.findIndex(item => item.key === key)],
               url: resData.url,