Issue with Angular Ionic badge count not refreshing properly

Question

Issue with Angular Ionic badge count not refreshing properly

I'm a beginner with Angular and I feel like I'm struggling to grasp the digest cycle. I'm attempting to update a badge count within an ion-tab (using Ionic).

"ion-tab"

<ion-tab title="Requests" badge="data.badge" ng-controller="RequestTabCtrl" badge-style="badge-assertive" icon-off="ion-pull-request" icon-on="ion-pull-request" href="#/tab/requests">
<ion-nav-view name="tab-requests"></ion-nav-view>

I've created a factory that stores an array, which gets updated via socket.io.

"notifications factory"

.factory('notifications',function(){
  var list = [];
  return{
    all: function(){
      return list;
    },
    add: function(data){
      list.push(data);
    },
    length: function(){
        return list.length;
    }
  };
});

.controller('RequestTabCtrl',function($scope,notifications){
  $scope.data = {
    badge : notifications.length()
    };
});

The issue I'm facing is that the badge count doesn't update when the notifications array changes through socket.io updates. I have confirmed that the array is being appropriately updated. I can even log the array length and see it changing. Additionally, I've set a scope variable in the ion-tab's child io-nav-view, so I can observe the expression {{requests.length}} updating in that view.

.controller('RequestsCtrl', function($scope,notifications) {
  $scope.requests = notifications.all();
})

I've attempted using $watch (within RequestTabCtrl) on notifications.length. I've also tried calling $apply (within RequestTabCtrl), resulting in a "$digest already in progress" error. Furthermore, I experimented with $timeout without seeing any positive outcome (both in RequestTabCtrl and the factory length function). Any help would be greatly appreciated.

javascript arrays angularjs ionic-framework

Answer 1

Answer №1

Special thanks to AjinderSingh for helping us find the solution.

There are two ways we can tackle this issue. The first approach involves using the $interval method:

.controller('RequestTabCtrl',function($scope,notifications,$interval){
    $interval(function(){
       $scope.data = {
           badge : notifications.length()
        };
    },2000);
});

The second approach is to use $broadcast from the factory when an item is added to the array, and then catching this event in the controller:

.factory('notifications',function($rootScope){
  var list = [];
  return{
    all: function(){
      return list;
    },
    add: function(data){
      list.push(data);
      $rootScope.$broadcast('update');
    },
    length: function(){
        return list.length;
    }
  };
});


.controller('RequestTabCtrl',function($scope,notifications,$interval){
      $scope.$on('update',function(){
           $scope.data = {
              badge : notifications.length()
            };
       });
 });

I have decided to go with the second approach as it appears to be more organized and efficient.

Answer 2

Special thanks to AjinderSingh for helping us find the solution.

There are two ways we can tackle this issue. The first approach involves using the $interval method:

.controller('RequestTabCtrl',function($scope,notifications,$interval){
    $interval(function(){
       $scope.data = {
           badge : notifications.length()
        };
    },2000);
});

The second approach is to use $broadcast from the factory when an item is added to the array, and then catching this event in the controller:

.factory('notifications',function($rootScope){
  var list = [];
  return{
    all: function(){
      return list;
    },
    add: function(data){
      list.push(data);
      $rootScope.$broadcast('update');
    },
    length: function(){
        return list.length;
    }
  };
});


.controller('RequestTabCtrl',function($scope,notifications,$interval){
      $scope.$on('update',function(){
           $scope.data = {
              badge : notifications.length()
            };
       });
 });

I have decided to go with the second approach as it appears to be more organized and efficient.

Answer 3

Answer №2

When the $ionicPlatform is ready, the $cordovaBadge.promptForPermission() function is called.
    
$scope.setBadge function is defined to set a badge value. It first checks if the permission has been granted using $cordovaBadge.hasPermission(). If permission is granted, it sets the badge value using $cordovaBadge.set(). If not, an error alert is shown.

$ionicPlatform.ready(function() {
    $cordovaBadge.promptForPermission();

    $scope.setBadge = function(value) {
        $cordovaBadge.hasPermission().then(function(result) {
            $cordovaBadge.set(value);
        }, function(error) {
            alert(error);
        });
    }
});

For more information, please visit

Answer 4

When the $ionicPlatform is ready, the $cordovaBadge.promptForPermission() function is called.
    
$scope.setBadge function is defined to set a badge value. It first checks if the permission has been granted using $cordovaBadge.hasPermission(). If permission is granted, it sets the badge value using $cordovaBadge.set(). If not, an error alert is shown.

$ionicPlatform.ready(function() {
    $cordovaBadge.promptForPermission();

    $scope.setBadge = function(value) {
        $cordovaBadge.hasPermission().then(function(result) {
            $cordovaBadge.set(value);
        }, function(error) {
            alert(error);
        });
    }
});

For more information, please visit

Issue with Angular Ionic badge count not refreshing properly

Answer №1

Answer №2

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