UAS2.0_DEV_TEST/app/view/form/mfilefield/Panel.js

Ext.define('uas.view.form.mfilefield.Panel', {
    extend: 'Ext.form.Panel',
    xtype: 'form-mfilefield',
    requires:[
        'Ext.ux.form.field.MFileField'
    ],

    id: 'mmf',

    bodyPadding: 12,

    items: [{
        xtype: 'mfilefield',
        value: '1001'
    }]
});