extjs中treepanel无法展开

Question

grade.root=new Ext.tree.AsyncTreeNode({
        text:"root",
        leaf:true//这个去掉
    });

Answer 1

我说的无法展开式指在appendchild之后,点击上级节点的+号,无法将下级节点展开,上级节点一直处于loader中

Answer 2

1.grade.root=new Ext.tree.AsyncTreeNode({
        text:"root",
        leaf:true   //这个去掉
    });
2.
var node=new Ext.tree.TreeNode({
                                id：100//加一个id配置
                                text:grade.hForm.getComponent("company.cName").getValue(),
                                leaf:true
                            });
3.grade.hForm.getComponent("company.cName").getValue(),//是否有值