AngularJS - Delay Controller Initialization for Asynchronous Operations http://midgetontoes.com/blog/2014/04/15/angularjs-delay-controller-initialization-for-asynchronous-operations/

controller.coffee

angular.module('controllers', ['services'])
  .controller('MyCtrl', ['$scope', ($scope) ->

    $scope.$watch('dataReady', (ready) ->
      init() if ready
    )

    init = () ->
      console.log('Init')
  ])

service.coffee

angular.module('services', [])
  .run(['$rootScope', 'dataService', ($rootScope, dataService) ->
    dataLoaded = false
    $rootScope.dataReady = false

    dataService.loadData().then(() ->
      dataLoaded = true
    )

    $rootScope.$watch(() ->
      dataLoaded
    , (ready) ->
      $rootScope.dataReady = ready
    )
  ])