Geolocation not getting on ios device

Ionic Framework ionic-v3
1

Hi,

I am not getting lat./lang. on my ios device when clicking on button called distance for filter the records based on the location.

I have used below code

Service.js

.factory(‘UserLocation’, function($ionicPopup){
var userLat;
var userLon;
return{
setlocation:function(){
alert(" In side set location ");
var geooption={enableHighAccuracy: false,maximumAge :1000};

        var geoSuccess = function(position) {
            userLat=position.coords.latitude;
            userLon=position.coords.longitude;
            $ionicPopup.alert({
                title: 'Title',
                template: 'Your current location is set. Latitude='+userLat+" Longitude = "+userLon
            });                
            //calculation for distance
            
        }; // var geoSuccess

        var geoError = function(err){
            isLocationSet=false;
            $ionicPopup.alert({
                title: 'Error In Getting Location',
                tempdate:"Location auto detect failed. Please start GPS or wireless or mobile network location access service. And then try again"
            });
        }; // var geoerror
        
        // call laction finder
         if (window.cordova && navigator.geolocation) {
                cordova.plugins.diagnostic.isLocationEnabled(function(enabled){
                    if(enabled){
                        alert("Before navigator");
                        navigator.geolocation.getCurrentPosition(geoSuccess,geoError,geooption);
                        alert("after navigator");
                    }
                    else{
                        alert("GPS off");
                    }
                });
                //navigator.geolocation.getCurrentPosition(geoSuccess,geoError,geooption);            
         }
        else{
            alert("window.cordova not support");
        }
    } // fun set location 
}

})

Controller.js

$scope.getUserLocation = function(){
//$ionicPopup.confirm()
var confirmShareLocation = $ionicPopup.confirm({
title: ‘Title’,
template: ‘Would Like to Use Your Current Location ?’,
cancelText :“Don’t Allow”,
okText :‘OK’,
});

        confirmShareLocation.then(function(res) {
             if(res) {
                //alert(" Allow ");
                UserLocation.setlocation();
                //console.log("IS Set :"+UserLocation.getlocationset());
                //alert("in Controller Latitude ="+UserLocation.getlatitude()+"Longitude ="+UserLocation.getlongitude();
             } else {
                alert(" Don't Allow ");
             }
        });
    };

Html file

< button class=“btn-filter” ng-click=“getUserLocation()” >Distance</button>

Can anyone help me on this?

Regards,