然而，我不明白为什么我需要调用$ apply的分辨率实际传播到那个回调。

myModule.service('GlobalConfigService',['$q','$rootScope',function($q,$rootScope) {
    var def = $q.defer();
    $(document).ready(function() {
        def.resolve(MyConfig.val);
        $rootScope.$apply();
    });
 
    def.promise.then(function () {
        console.log('I am called only when $apply() is called. Why?');
    });
 
    return def.promise;
}]);