Answers

• ChaseFlorell CAInsider, University mod

  November 2015 edited November 2015

  Pins are added via Latitude/Longitude coordinates and the documentation is found here.

  If the user needs to choose a location, you're probably going to have to write a custom renderer that exposes the touch event. There will be a callback with the coordinates that you can then set to your ViewModel if you need to store it later.

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• TorbenKruse DEMember ✭✭✭

  November 2015 edited November 2015 Accepted Answer

  @TioWidow

  I would not recommend using single tap to add pins to the map, that may interfere with the selection of a pin.

  For example, you can use LongPress instead. To do that add a UILongPressGestureRecognizer to the MKMapView in your MapRenderer.

  protected override void OnElementChanged(ElementChangedEventArgs<View> e)
  {
      base.OnElementChanged(e);
  
      if (e.OldElement != null) return;
  
      var map = this.Control as MKMapView;
      if(map == null) return;
  
      map.AddGestureRecognizer(new UILongPressGestureRecognizer(MapLongPress));
  
  }
  
  private void MapLongPress(UILongPressGestureRecognizer recognizer)
  {
      if (recognizer.State != UIGestureRecognizerState.Began) return;
  
      var map = this.Control as MKMapView;
  
      if(map == null) return;
  
      var pixelLocation = recognizer.LocationInView(map);
      var geoCoordinate = map.ConvertPoint(pixelLocation, map);
  
      // Add new Annotation(pin) with the coordinate
  }
  

  2
• TioWidow BRMember ✭

  November 2015

  @TorbenKruse said:
  @TioWidow

  I would not recommend using single tap to add pins to the map, that may interfere with the selection of a pin.

  For example, you can use LongPress instead. To do that add a UILongPressGestureRecognizer to the MKMapView in your MapRenderer.

  protected override void OnElementChanged(ElementChangedEventArgs<View> e)
  {
    base.OnElementChanged(e);
  
    if (e.OldElement != null) return;
  
    var map = this.Control as MKMapView;
    if(map == null) return;
    
    map.AddGestureRecognizer(new UILongPressGestureRecognizer(MapLongPress));
    
  }
  
  private void MapLongPress(UILongPressGestureRecognizer recognizer)
  {
    if (recognizer.State != UIGestureRecognizerState.Began) return;
  
    var map = this.Control as MKMapView;
    
    if(map == null) return;
    
    var pixelLocation = recognizer.LocationInView(map);
    var geoCoordinate = map.ConvertPoint(pixelLocation, map);
  
    // Add new Annotation(pin) with the coordinate
  }
  

  Thanks for listening

  I will try to use this with the custom renderer because I am using a object Map ("xamarin.forms.maps") in a Page.

  Anyway I believe that your help will be very useful.

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• matheuscrespi Member ✭✭

  January 2020

  I am working with maps in xamarin iOS and I need to detect a tap and add a pin in the location tapped.
  For exemple, the image below I have sectors on a map and if the user touches one of the sectors I execute a method that verify if touch is inside or outside of the polygon, that isn't the problem! but after in case I verified that it is inside, how can I add the pin at the sector?
  

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