修改了一下ztree的示例
<link rel="stylesheet" href="css/metroStyle/metroStyle.css" type="text/css">
<script type="text/javascript" src="js/jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="js/jquery.ztree.core-3.5.js"></script>
<script type="text/javascript" src="js/jquery.ztree.excheck-3.5.js"></script>
<script type="text/javascript">
<!--
var setting = {
check: {
enable: true
},
data: {
key: {
name: "label"
}
},
view: {
showIcon:false
}
};
var zNodes =[{
"Code": "G2",
"Level": 0,
"id": 11166,
"label": "G2:信息与知识传播",
"children": [{
"Code": "G3",
"Level": 1,
"id": 11167,
"label": "G3:信息与知识传播"
}]
}];
$(document).ready(function(){
$.fn.zTree.init($("#treeDemo"), setting, zNodes);
});
//-->
</script>
根节点关闭时显示－，打开时显示＋。请问是什么原因？

我的也是

请检查一下 css 设置