ng-if /ng-show working only when page loads in ionic - angularjs

Question

I have a nested state .
The view associated to it my app header.
it looks like this:
<ion-view cache-view="false">
<div class="navbar-fixed-top navbar-header bar bar-header " ng-if="showHeader">
<div class="container row">
{{ showSubHeader}}
<div ng-if="showSubHeader" class="topPull" draggable >
<button ng-if="showSubHeader" class="button-icon"><img src="img/topImg.jpg"></button>
</div>
</div>
</div>
</ion-view>
Now, I want div to be shown when showSubHeader is true.
The expression {{ showSubHeader }} changes from true to false correctly, but div does not hide/show according to value variable.
Is there a way to fix it?
Initially on page load, div shows/hides accordingly but div does not hide when variable value changes after loading.
controller:
.controller('AppCtrl', function($scope, $rootScope, $ionicModal, $timeout, $ionicSlideBoxDelegate, $state) {
$scope.showHeader=true;
$scope.showSubHeader=true;
$scope.checkBill= function(){
$scope.showSubHeader=false;
$state.go('menu.TotalBill')
}
})

Answer 1

Change $scope.showSubHeader=false; to $scope.showSubHeader =!$scope.showSubHeader;, then you will be fine.
Check out my example:
var app = angular.module('app', []);
app.controller('myctrl', ['$scope', function($scope) {
$scope.test = true;
$scope.hidden_test = true;
$scope.click = function() {
$scope.hidden_test = !$scope.hidden_test;
};
}]);
.outer {
background: #e2e2e2;
border: 1px solid #000000;
.inner {
background: #c2c2c2;
border: 1px solid #00aa00;
padding: 1px 0 0 25px;
}
}
<script src="//cdnjs.cloudflare.com/ajax/libs/angular.js/1.3.14/angular.min.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<div ng-app="app">
<div ng-controller="myctrl">
<div class="outer" ng-if="test">
<p>Test</p>
<div class="inner" ng-if="hidden_test">
<p>Hidden Test</p>
</div>
<button ng-click="click()">Click</button>
</div>
</div>
</div>