:bug: create audiobook, post type error

src/routes/Resource/AudioBook/AudioBookCreate.js

@@ -69,8 +69,8 @@ export default class AudioBookCreatePage extends PureComponent {
         const { audioPath, audioFormat, fileList, ...params } = values;
         // 1.提取图片信息
         let newImg = {};
-        if (Array.isArray(fileList) && fileList.length) {
-          const { path, type, size, url } = fileList[0];
+        if (Array.isArray(this.state.fileList) && this.state.fileList.length) {
+          const { path, type, size, url } = this.state.fileList[0];
           newImg = {
             ...img,
             url,