如何在不使用$ watch的情况下更新作用域值

Question

I have using custom directive

<users stats="stats"></users>

When we change the scope object from main controller, i have updating directive scope value also

app.directive('users', function(){
    var directive = {};
    directive.restrict = "E";
    directive.templateUrl = "templates/partials/users_stats.html";
    directive.scope = {stats:'='};
    directive.controller = "userStatsCtrl"
    return directive;
});

So, Inside the directive controller, i am doing some func. like

app.controller("userStatsCtrl", function($scope){
    $scope.$watch('stats', function(newValue) {
      if (angular.isDefined(newValue)) {
        .....
      }
    });
})

So here, i am using $watch to listen the scope, If it is update, I will do the some perform.

my question is, I dont want to use watch to listen the scope, If scope gets updated, i need to do some perform.

So how to update scope value without using scope.$watch

Answer 1

When ever "scope.stats" value get changed in your main controller, you can broadcast an event and receive the same event in your directive and do operation what ever you want. Example code for broadcast an event:

$scope.$broadcast('yourEventName');

Receive an event in directive:

$scope.$on('yourEventName', function(){

});

Answer 2

how about trying:

<users stats="stats" ng-change="onUserStatChange($event)"></users> 
                           or
<users stats="stats" ng-blur="onUserStatChange($event)"></users>

and then in controller:

$scope.onUserStatChange = function(event) {
    //event.whatever
}