Ext4隐藏pagingtoolbar中的刷新按钮方法

var panel = new Ext.panel.Panel({
    dockedItems: [{
           xtype: 'pagingtoolbar',
           store: store,   // same store GridPanel is using
           dock: 'bottom',
           displayInfo: true
       }]
});

var length = panel.dockedItems.keys.length;
var refreshStr= "";
for (var i = 0; i < length; i++) {
   if (panel.dockedItems.keys[i].indexOf("pagingtoolbar") !== -1) {
      refreshStr= panel.dockedItems.keys[i];
   }
}
panel.dockedItems.get(refreshStr).child('#refresh').hide(true);

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