我是Extjs的新手，我想知道是否有一个选项可以在模板的div中呈现按钮。我正在添加文件：

Ext.define('itfm.application.view.SystemStatusHeader', {

extend: 'Ext.panel.Header',
alias: 'widget.systemStatusHeader',
headingTpl: '<div><span id="{id}-textEl" class="{cls}-text {cls}-text-{ui}">{title}</span><span id="targetId"></span></div>',
subTitleTpl: '<div id="{id}-textEl" class="{cls}-text {cls}-text-{ui} {cls}-subtitle">{subtitle}</div>',

initComponent: function() {
    var me = this;
    if(me.subtitle)  {
        var tpl = new Ext.Template(me.subTitleTpl);
        me.headingTpl = me.headingTpl.concat(tpl.apply({subtitle: me.subtitle,cls:'{cls}'}));
    }

    this.callParent(arguments);

      if(me.btn){
          renderTo:'#targetId';  --> how can i set it inside the div
      }

}

先谢谢你