Josh O'Connor Josh O'Connor - 9 months ago 127
iOS Question

Use of unresolved identifier 'enumerate' after Swift Migration

I have an array, called customAnnotationsArray, in which I am appending a class (Annotations) to. This class, Annotations, is a subclass of MKAnnotation and NSObject. In my previous Swift version, the code

for (index, value) in enumerate(customAnnotationArray)
worked wonderfully to extract the pin's index. Now, it is saying that there is "Use of unresolved identifier 'enumerate'. Ive researched a ton and cannot find any resources. How do I fix this?

//Annotations array (gets populated with annotations on data load)
var customAnnotationArray = [Annotations]()

//When tapping the MKAnnotationView.
func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView,
calloutAccessoryControlTapped control: UIControl) {

let theAnnotation = view.annotation

//ERROR BELOW IN enumerate "Use of unresolved identifier 'enumerate'
for (index, value) in enumerate(customAnnotationArray) {

if value === theAnnotation {
//print("The annotation's array index is \(index)")

//Im passing these variables in prepareForSegue to VC
markerIndex = index
addressSelected = addressArray[index]

let vc = storyboard.instantiateViewController(withIdentifier: "updateRecordVC")
self.navigationController!.pushViewController(vc, animated: true)

//Annotations class if that helps.
class Annotations: NSObject, MKAnnotation {
let title: String?
let locationName: String
let coordinate: CLLocationCoordinate2D
let pinColor: MKPinAnnotationColor

init(title: String, coordinate: CLLocationCoordinate2D, locationName: String, pinColor:MKPinAnnotationColor) {
self.title = title
self.coordinate = coordinate
self.locationName = locationName
self.pinColor = pinColor

var subtitle: String? {
return locationName

func currentPinColor(_ currentUser: Double) -> MKPinAnnotationColor? {
switch currentUser {
case 0:
return .green
case 1:
return .purple
return .green

Answer Source

Try using the enumerated() method instead:

for (index, value) in customAnnotationArray.enumerated()

Hopefully this is what you're looking for...