/// ------------------------------------------------------------------------------------------------
        ///
        protected override void OnElementChanged(Xamarin.Forms.Platform.iOS.ElementChangedEventArgs <View> e)
        {
            try
            {
                base.OnElementChanged(e);
                if (e.OldElement != null)
                {
                    if (formsMap == null)
                    {
                        formsMap = (CustomMap)e.NewElement;
                    }
                    this.MapViewInstance().GetViewForAnnotation = null;
                    customPins.Clear();
                }
                if (e.NewElement != null)
                {
                    if (formsMap == null)
                    {
                        formsMap = (CustomMap)e.NewElement;
                    }
                    var customView = Control as CustomMKAnnotationView;

                    if (Control != null)
                    {
                        Control.RemoveGestureRecognizer(_tapRecogniser);
                    }
                    base.OnElementChanged(e);
                    if (Control != null)
                    {
                        Control.AddGestureRecognizer(_tapRecogniser);
                    }

                    if (customPins == null)
                    {
                        customPins = new List <CustomPin>();
                    }
                    else if (customPins != null && customPins.Count != 0)
                    {
                        customPins.Clear();
                    }

                    var singlePin = MapViewModel.GetCurrentPin();
                    if (singlePin != null)
                    {
                        formsMap.Pins.Add(singlePin.Pin);
                        customPins.Add(singlePin);
                    }
                    formsMap.ClearPins = () =>
                    {
                        if (customPins != null)
                        {
                            formsMap?.Pins.Clear();
                            customPins.Clear();
                        }
                    };
                    formsMap.LoadPins = Pins =>
                    {
                        if (Pins != null)
                        {
                            customPins.Clear();
                            formsMap.Pins.Clear();
                            foreach (var pin in Pins)
                            {
                                formsMap.CustomPins = Pins;
                                formsMap.Pins.Add(pin.Pin);
                                customPins.Add(pin);
                            }
                        }
                    };
                    this.MapViewInstance().GetViewForAnnotation = GetViewForAnnotation;
                    formsMap.DisposeMapControl = () =>
                    {
                        try
                        {
                            //
                            annotationView?.RemoveFromSuperview();
                            annotationView?.Dispose();
                            //
                            _nativeMap?.RemoveFromSuperview();
                            _nativeMap?.Delegate?.Dispose();
                            _nativeMap.Delegate = null;
                            _nativeMap?.Dispose();
                            //
                            NativeView?.RemoveFromSuperview();
                            NativeView?.Dispose();
                            //
                            formsMap   = null;
                            customPins = null;
                            singlePin  = null;
                            //
                            customView?.RemoveFromSuperview();
                            customView?.Dispose();
                            //
                            Control?.RemoveFromSuperview();
                            Control?.Dispose();
                            //
                        }
                        catch (ObjectDisposedException ex)
                        {
                        }
                        catch (Exception ex)
                        {
                        }
                    };
                }
            }
            catch (Exception ex)
            {
            }
        }