updating $scope of controller A from controller B - angularjs

Question

var myApp = angular.module('myApp', []);
myApp.factory('Data', function() {
return {message: "I'm data from a service"}
})
function FirstCtrl($scope, Data){
$scope.data = Data;
}
function SecondCtrl($scope, Data){
//I want to send a string to the service so that the view associated with FirstCtrl is updated.
}
Ok, lets take this code for example. How would one set the message string from inside SecondCtrl so that the view binded with FirstCtrl is updated?

Answer 1

You may share data between controllers using a service (factory), but you will not use $scope directly.
Please refer to this video for a demonstration:
https://egghead.io/lessons/angularjs-sharing-data-between-controllers
Thumbs up for egghead \o/
Edit:
var myApp = angular.module('myApp', []);
myApp.factory('Data', function() {
return {message: "I'm data from a service"}
})
function FirstCtrl($scope, Data){
$scope.data = Data;
}
function SecondCtrl($scope, Data){
$scope.data = Data;
// Simply set the message or bind it to an input on your view:
$scope.data.message = 'new value'
}
Here is a demo: http://jsfiddle.net/suhvtr5r/
If this doesn´t work, please share your views with us

Answer 2

One thing you can do is to create another parent controller like this,and put common things to both controllers
<div ng-controller="parentController">
<div ng-Controller="pageOneController">
<input placeholder="{{placeholder}}" type="text" />
</div>
<div ng-Controller="pageTwoController">
<--other html-->
</div>
</div>
app.controller('parentController', ['$scope', function($scope) {
$scope.placeholder = "this is common to both child controllers";
}]);

Answer 3

If you want to do that you need getter and setter in your service here is the fiddle that do the trick for you :
HTML:
<div ng-app="myApp">
<div ng-controller="FirstCtrl">my first cotroller : {{data.message}}</div>
<div ng-controller="SecondCtrl">my second controller :
<input type="text" ng-model="data.message" ng-change="update()">
</div>
</div>
Angular:
var myApp = angular.module('myApp', []);
myApp.factory('Data', function () {
return {
message: '',
get: function () {
alert("DasdaS");
return this.message;
},
set: function (secondCtrlStr) {
this.message = secondCtrlStr;
}
};
})
function FirstCtrl($scope, Data) {
$scope.data = Data;
}
function SecondCtrl($scope, Data) {
$scope.update = function () {
Data.set($scope.data.message);
};
}