javascript - DynaTree 根节点 null / undefined - children undefined

Question

("#tree").dynatree({                
minExpandLevel: 1,              
//persist: true,                
children: [{"title":"First Location",
"isFolder":true,
"expand":true,
"key":"location.92",
"icon":"location.gif",
"children":[{"title":"<span class='assetType'>First Location Child<\/span>",
"key":"locationid=92&typeid=1",
"expand":true,
"icon":"equipment.gif",
"children":[ (etc...)

所以我这样做：

var rootNode = $("#tree").dynatree("getRoot");
var title = rootNode.data.title;

title = null

...好的，所以我尝试：

var rootNode = $("#tree").dynatree("getRoot");
var node = rootNode.getChildren();
var title = node.data.title;

无法读取未定义的属性“标题”

如果我只是：

alert(node);

我得到：

DynaTreeNode<location.92>: '第一个位置'

所以...？

既然我在问，在控制台中：

jquery.dynatree.min.js:710:49:53.215 - Option 'title' is no longer supported.

?

有关的？

Uncaught TypeError: Cannot read property 'parentNode' of null
ra

Answer 1

rootNode 是（不可见的）系统根，rootNode.data.title未设置。由于 node.getChildren() 返回一个列表，它应该是

var rootNode = $("#tree").dynatree("getRoot");
var nodeList = rootNode.getChildren();
var title = nodeList[0].data.title;

Answer 2

我得到了答案：

//node = item which has isFolder() = false, islazy() = false

var topnode = node.parent;
topnode.reloadChildren(function(topnode, isOk){});

Answer 3

您可以使用以下方法阅读标题：

var rootNode = $("#tree").dynatree("getRoot");  
var realRootTitle = rootNode.childList[1].data.title;