在locationChangeSuccess上的AngularJS $ state

Question

我正在尝试检索在locationChangeSuccess事件的状态对象上设置的自定义属性（面包屑）。我可以通过

在控制台中看到该属性

  

event.targetScope。$ state

但是当我尝试引用

  

event.targetScope。$ state.current

这些值消失了

app.js

   @Override
public void doFilter(final ServletRequest request, final ServletResponse response
    , final FilterChain chain) throws IOException, ServletException {

    final HttpServletRequest httpRequest = (HttpServletRequest) request;
    final SpnegoHttpServletResponse spnegoResponse = new SpnegoHttpServletResponse(
            (HttpServletResponse) response);

    // skip authentication if resource is in the list of directories to exclude
    if (exclude(httpRequest.getContextPath(), httpRequest.getServletPath())) {
        chain.doFilter(request, response);
        return;
    }

此事件触发时，有人可以帮助获取状态对象吗？