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I tried to select my annotation programmatically. So in my custom map renderer i used this.

    _iosMap.SelectAnnotation(myAnnotation, true);

    myAnnotation got selected all right but right after that it got deselected. (Info window showed for a second than it vanished)I have no idea why. I mean when user tapped in certain regions my program adds annotation to map and right after that it calls SelectAnnotation to display the infowindow.

I tried to implement this solution.

    void OnDidDeselectAnnotationView(object sender, MKAnnotationViewEventArgs e) {
     MKMarkerAnnotationView annotationView = (MKMarkerAnnotationView) e.View;
    
     if (someBoolToDetectUnwantedDeselect) {
      _iosMap.SelectAnnotation(annotationView.Annotation, true);
     }
    }

But it did not work. I mean annotation got selected(OnDidSelectAnnotationView method fired.) But infowindow didn't appear. How can i solve this?

I tried to use GestureRecognizerShouldBegin(saw it here. ) But on select,deselect GestureRecognizerShouldBegin didn't fire.

Addition : I reproduces the issue here.

http://www.mediafire.com/file/s1ahsdum258yqpk/selectannotationproblem.rar/file

When tapped on map anywhere besides pin SelectAnnotation fires in CustomMapRenderer. Infowindow shows for a second than it vanishes.

When i added this to the OnDidDeselectAnnotationView

((MKMapView)Control).SelectAnnotation(((MKMapView)Control).Annotations.ElementAt(0), true);

In vanishes on the first tap just like before. And on second, third taps it works okay. Why first?

Son Goku
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1 Answers1

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I solved it by adding delay.

private void OnTap(UITapGestureRecognizer recognizer)
{
   //
    PerformSelector(new ObjCRuntime.Selector("ShowAnnotation"), null, 0.6f);
}

[Export("ShowAnnotation")]
void ShowAnnotation()
{
    ((MKMapView)Control).SelectAnnotation(((MKMapView)Control).Annotations.ElementAt(0), true);
}
Son Goku
  • 33
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