更改MKA注释图钉颜色

Question

I have an array of Meetup objects that display on a map as red pins. I would like to change the color of the pin based on an attribute of eachhe Meetup object. Each Meetup has a category. If the first Meetup in the array has a Category A, I would like the pin to be red, and if the second Meetup has a Category B, I would like the pin to be blue (And so on). I am trying to do this in viewForAnnotation.

Here is some of my code:

func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {

  if annotation is Meetup {

    let identifier = "Location"
    var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier) as! MKPinAnnotationView!
    if annotationView == nil {
      annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)

      annotationView.enabled = true
      annotationView.canShowCallout = true
      annotationView.animatesDrop = false
      annotationView.pinTintColor = UIColor(red: 255/255, green: 36/255, blue: 0, alpha: 1)
      annotationView.tintColor = UIColor(white: 0.0, alpha: 0.5)

I am trying to do something in here like:

if annotation is Meetup where Meetup.category == "Category A" {
          annotationView.pinTintColor = UIColor(red: 255/255, green: 36/255, blue: 0, alpha: 1)
} else if annotation is Meetup where Meetup.category == "Category B" {
          annotationView.pinTintColor = UIColor(red: 0, green: 36/255, blue: 255/255, alpha: 1)

Can someone please point me in the right direction on how to get this accomplished?

Thanks!

Answer 1

I suppose you are trying to change the pin color by category, You need to use "Switch" the actually code is like this:

func pinColor(type:String) -> UIColor{
var color = UIColor.purpleColor()
switch category {
case "Category A":
    color = UIColor(red: 255/255, green: 36/255, blue: 0, alpha: 1)
case "Category B":
    color = UIColor(red: 0, green: 36/255, blue: 255/255, alpha: 1)
default:
    color = UIColor.whiteColor()
}
return color

}

hope this is what you want!