public void GenView(MKClusterAnnotation cluster)
{
AnnotationViewSize annotationSize = MapSettings.AnnotationSize;
if (cluster != null)
{
var renderer = new UIGraphicsImageRenderer(new CGSize(annotationSize.Width,
annotationSize.Height));
var count = cluster.MemberAnnotations.Length;
Image = renderer.CreateImage((context) => {
//circle
UIColor.FromRGB(230, 141, 119).SetFill();
UIBezierPath.FromOval(new CGRect(0,
0,
annotationSize.Width,
annotationSize.Height)).Fill();
//text
var attributes = new UIStringAttributes()
{
ForegroundColor = UIColor.Black,
Font = UIFont.BoldSystemFontOfSize(20)
};
var text = new NSString($"{count}");
var size = text.GetSizeUsingAttributes(attributes);
var rect = new CGRect(20 - size.Width / 2, 20 - size.Height / 2, size.Width, size.Height);
text.DrawString(rect, attributes);
});
}
}
private void SetViewMode(AnnotationViewSize viewSize)
{
if (viewSize == annotationViewSize)
{
return;
}
UpdateCardForSize(viewSize);
annotationViewSize = viewSize;
}
private void UpdateCardForSize(AnnotationViewSize viewSize)
{
cardMeshTransition.TransitionToViewSize(annotationData, viewSize);
cardCanvasTransition.TransitionToViewSize(annotationData, viewSize);
}
public abstract void TransitionToViewSize(AnnotationData data, AnnotationViewSize nextAnnotationViewSize);
