角度ui路由器中的fromState返回空对象

Question

When using angular ui-router, the fromState parameter returns an empty object while the toState works just fine, i would like to access fromState.name . My ctrl looks like this:

.controller('MainCtrl', function ($rootScope) {

  // State change start
  $rootScope.$on('$stateChangeStart', function (event, toState, fromState){

    console.log(fromState); // -> Object {url: "/program", templateUrl: "views/program.html", resolve: Object, name: "program"}
    console.log(toState); // -> Object {} when clicking on e.g. 'news'

  });

});

Answer 1

I think you are missing some arguments in your stateChangeStart function. The toParams and fromParams specifically. Check the docs for that callback again. What you have named fromState is probably really toParams, and if the state has no params, thats why it is empty.