Add Annotations in MapKit - Programmatically - swift

Question

I am trying to add annotations to my map.
I have an array of points with coordinates inside.
I am trying to add annotations from those coordinates.
I have this defined:
var points: [CLLocationCoordinate2D] = [CLLocationCoordinate2D]()
let annotation = MKPointAnnotation()
points has coordinates inside. I checked. And I do this:
for index in 0...points.count-1 {
annotation.coordinate = points[index]
annotation.title = "Point \(index+1)"
map.addAnnotation(annotation)
}
It keeps adding only the last annotation... Instead of all of them.
Why is this?
By the way, is there a way to delete a specified annotation, by title for example?

Answer 1

Each annotation needs to be a new instance, you are using only one instance and overriding its coordinates. So change your code:
for index in 0...points.count-1 {
let annotation = MKPointAnnotation() // <-- new instance here
annotation.coordinate = points[index]
annotation.title = "Point \(index+1)"
map.addAnnotation(annotation)
}

Answer 2

You can edit your for loop with the below code
I think your array would be like points array
let points = [
["title": "New York, NY", "latitude": 40.713054, "longitude": -74.007228],
["title": "Los Angeles, CA", "latitude": 34.052238, "longitude": -118.243344],
["title": "Chicago, IL", "latitude": 41.883229, "longitude": -87.632398]
]
for point in points {
let annotation = MKPointAnnotation()
annotation.title = point["title"] as? String
annotation.coordinate = CLLocationCoordinate2D(latitude: point["latitude"] as! Double, longitude: point["longitude"] as! Double)
mapView.addAnnotation(annotation)
}
it's working for me. All the best for you.