Pull request #3775: BI-156033 fix: callback执行时拿到的配置还是初始化的，set无效了

Merge in VISUAL/fineui from ~OLIVER.CHEN/fineui:master to master

* commit 'b7f58f9963d07bb1055bd6b89c18f05e5e4ac1e8':
  BI-156033 fix: callback执行时拿到的配置还是初始化的，set无效了

packages/fineui/src/base/single/input/file.js

@@ -228,7 +228,7 @@ const sendFile = (toString => {
                             attachO.filename = handler.file.fileName;
                             if (handler.maxLength === 1) {
                                 handler.attach_array[0] = attachO;
-                            //                                   handler.attach_array.push(attachO);
+                                //                                   handler.attach_array.push(attachO);
                             } else {
                                 handler.attach_array[current] = attachO;
                             }
@@ -585,8 +585,8 @@ export class File extends Widget {
     }
 
     _events(wrap) {
-        const { maxLength, errorText } = this.options;
         const callback = () => {
+            const { maxLength, errorText } = this.options;
             event.del(wrap.dom.input, "change", callback);
             const input = wrap.dom.input.cloneNode(true);
             const files = F(wrap.dom.input);