ux.form.field.Month 只能选年、月的时间扩展

效果如图，亲测6.2.1版本可用，用法同时间选择控件

 //月弹窗扩展
 //只选月
 Ext.define('ux.picker.Month', {
     extend: 'Ext.picker.Month',
     alias: 'widget.uxMonthpicker',
     alternateClassName: 'ux.uxMonthPicker',
     afterRender: function () {
         var me = this;
         //取消监听mousedown事件，否则无法触发事件
         me.el.on('mousedown', me.onElClick, me, { translate: false });
         me.callParent();
     }
 });

 //扩展
 //只能选月的时间扩展
 Ext.define('ux.form.field.Month', {
     extend: 'Ext.form.field.Date',
     alias: 'widget.uxMonthfield',
     xtype: 'uxMonthfield',
     requires: ['ux.picker.Month'],
     format: 'Y-m',
     selectMonth: new Date(),
     createPicker: function () {
         var me = this;
         return new ux.picker.Month({
             value: new Date(),
             renderTo: document.body,
             floating: true,
             hidden: true,
             focusOnShow: true,
             listeners: {
                 scope: me,
                 select: me.onSelect,
                 cancelclick: me.onCancelClick,
                 okclick: me.onOKClick,
                 yeardblclick: me.onOKClick,
                 monthdblclick: me.onOKClick
             }
         });
     },
     onCancelClick: function () {
         var me = this;
         me.selectMonth = null;
         me.collapse();
     },
     onOKClick: function () {
         var me = this;
         if (me.selectMonth) {
             me.setValue(me.selectMonth);
             me.fireEvent('select', me, me.selectMonth);
         }
         me.collapse();
     },
     onSelect: function (m, d) {
         var me = this;
         me.selectMonth = new Date((d[0] + 1) + '/1/' + d[1]);
     }
 });