对 List,DataGrid中listItems的理解

listItems : Array

/** * 刷新数据 */private function refreshData():void{var i:int = 0;var n:int = listItems.length;var instance:CheckBoxItemRenderer;for (i = 0; i < n; i++){instance = listItems[i][0] as CheckBoxItemRenderer;if (instance){instance.invalidateData();}}}?

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