Ztree取消选中的所有节点
var treeObj = $.fn.zTree.init($("#zTree"), setting, data.obj);
treeObj.checkAllNodes(false); treeObj.cancelSelectedNode();
var treeObj = $.fn.zTree.init($("#zTree"), setting, data.obj);
treeObj.checkAllNodes(false); treeObj.cancelSelectedNode();