$scope on $ionicPopup not recognized - angularjs

Question

I need a dynamic popup where images change its opacity when clicked. It works perfectly, but only when the popup is out of a function. I need it inside a function.
This is my controller:
$scope.imgIds = ['0', '1', '2', '3', '4', '5'];
$scope.selectedImg = '-1';
$scope.itemClicked = function(index){
console.log(index);
$scope.selectedImg = index;
}
/*$ionicPopup.prompt({
title: 'Como foi seu treino?',
scope: $scope,
templateUrl: 'templates/icons.html'
});*/
//Envia Mensagem do Treino
$scope.sendMessage = function(tempo,id_serie) {
$ionicPopup.prompt({
title: 'Como foi seu treino?',
scope: $scope,
templateUrl: 'templates/icons.html'
}).then(function(res) {
$http({
url: $localStorage.url+'/serie/mensagem',
method: 'POST',
data: {id_serie : id_serie, mensagem :res, tempo: tempo, datahora: $scope.getData()},
headers : {'Content-Type':'application/json; charset=UTF-8'}
});
});
}
//Finaliza Treino
$scope.finalizar = function() {
document.getElementById('timer').getElementsByTagName('timer')[0].stop();
document.getElementById('play').className = 'button icon button-balanced button-block ion-play col';
var tempo = document.getElementById('timer').getElementsByTagName('timer')[0].innerText;
var confirmPopup = $ionicPopup.confirm({
title: 'Atenção',
template: 'Tempo: '+tempo+'<br>Finalizar Treino?',
buttons: [
{ text: 'Cancelar', onTap: function(e) { return false; }},
{ text: '<b>Ok</b>',
type: 'button-positive',
onTap: function(e) {
document.getElementById('timer').getElementsByTagName('timer')[0].start();
document.getElementById('timer').getElementsByTagName('timer')[0].stop();
$state.go('tab.series', {});
$scope.sendMessage(tempo,$scope.id_serie);
}
},
]
});
}
This is icons.html:
<style>
.selected {opacity:1;margin:auto;}
.unselected {opacity:0.5;margin:auto;}
</style>
<div class='row'>
<img ng-repeat="imgId in imgIds" src="img/{{imgId}}.png" width="30" height="30"
ng-class="{'selected':{{imgId}}==selectedImg,'unselected':{{imgId}}!=selectedImg}" ng-click="itemClicked(imgId)"/>
</div>
Algum Comentário?<br>
<input type="text"/>
There is no error on console. But the images don't change css, the popup gets locked and the buttons doesn't do nothing.

Answer 1

I got it.
The problem is I put $state.go('tab.series'); before call the popup, so the scope were different.