fix:修复选择讲师搜索报错问题

src/modules/course-manage/offline-course/AddOfflineCourse.jsx

@@ -2,7 +2,7 @@
  * @Author: 吴文洁
  * @Date: 2020-08-05 10:07:47
  * @LastEditors: wufan
- * @LastEditTime: 2021-05-25 15:25:33
+ * @LastEditTime: 2021-05-25 20:00:18
  * @Description: 线下课新增/编辑页
  * @Copyright: 杭州杰竞科技有限公司 版权所有
  */
@@ -871,9 +871,10 @@ class AddOfflineCourse extends React.Component {
                     }
                   }}
                   onSearch={(value) => {
-                    teacherQuery.nickName = value
+                    let _teacherQuery = {...this.state.teacherQuery};
+                    _teacherQuery.nickName = value
                     this.setState({
-                      teacherQuery
+                      teacherQuery: _teacherQuery
                     }, () => {
                       this.getTeacherList()
                     })