Ionic ion-view header behind ios status bar

how do I avoid ionic header from getting behind ios status bar like this ?

enter image description here

The header is come from this code :

<ion-view title="{{title}}" hide-nav-bar="false">

Finally the problem is solved.

in app.js

$ionicPlatform.ready(function() {
  if (window.cordova && $cordovaKeyboard) {
        $cordovaKeyboard.hideAccessoryBar(true);
    }
    if (window.StatusBar) {
        StatusBar.styleDefault();
    }
}

and, if that doesn't solve the problem yet. In index.html, cordova.js should be imported on the very last.

<head>
    ...
    ...
    ...
    <script src="cordova.js"></script>
</head>

This solve my problem.