How to define the order of overlapping MKAnnotationViews?

Question

I have several MKAnnotations (and their corresponding views) in my map, and it sometimes gets really crowded. Now, the annotations in my app come in two flavors: some are bo

Answer 1

Swift 3:

I get pin locations from API and I was having similar issues, the pins that had to be on top weren't. I was able to solve it like this.

var count = 0 // just so we don't get the same index in bottom pins
func mapView(_ mapView: MKMapView, didAdd views: [MKAnnotationView]) {  
    for view in views {
        view.layer.zPosition = CGFloat(count)
    }
    count += 1
    if count > 500 {
        count = 250 // just so we don't end up with 999999999999+ as a value for count, plus I have at least 30 pins that show at the same time and need to have lower Z-Index values than the top pins. 
    }

}

Hope this helps