Select option can not be select in ios

ionic-v1
1

select option can not be select in ios but its working in android.

in controller,

$scope.distUnits = [{ name: "Meters", id: 1 }, { name: "Kilometers", id: 2 },{ name: "Miles", id: 3 }];

$scope.selectedOption = $scope.distUnits[0];

<select data-ng-options="o.id as o.name for o in distUnits track by o.id" ng-model="selectedOption" "></select>

i have set “false” in my app.js file

 $ionicPlatform.ready().then(function (){
    if(window.cordova && window.cordova.plugins.Keyboard) {
      cordova.plugins.Keyboard.hideKeyboardAccessoryBar(false);
       cordova.plugins.Keyboard.disableScroll(true);
    }
    if(window.StatusBar) {
      StatusBar.styleDefault();
    }
  })