willReuseMapClusterAnnotation does not work in Swift

[pkuklis]

CCHMapClusterController works great with my Swift project except for one issue:

The willReuseMapClusterAnnotation does not seem to work in Swift. I believe that I've added all files correctly through CocoaPods & a bridging header and that the controller is set up like in the example but the statement willReuseMapClusterAnnotation does not get executed (No statements are printed inside the function).

I would be really thankful for any help!

MapViewController

func mapClusterController(mapClusterController: CCHMapClusterController, willReuseMapClusterAnnotation mapClusterAnnotation: CCHMapClusterAnnotation) {
      let clusterAnnotationView = (self.mapView.viewForAnnotation(mapClusterAnnotation) as! ClusterAnnotationView)
      clusterAnnotationView.count = mapClusterAnnotation.annotations.count
      clusterAnnotationView.isUniqueLocation = mapClusterAnnotation.isUniqueLocation()
      print(clusterAnnotationView.count)
    }

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

      var annotationView: MKAnnotationView?
      if (annotation is CCHMapClusterAnnotation) {
        let identifier = "clusterAnnotation"
        var clusterAnnotationView = (mapView.dequeueReusableAnnotationViewWithIdentifier(identifier) as? ClusterAnnotationView)
        if clusterAnnotationView != nil {
          clusterAnnotationView!.annotation = annotation
        } else {
          clusterAnnotationView = ClusterAnnotationView(annotation: annotation, reuseIdentifier: identifier)
          clusterAnnotationView!.canShowCallout = true
        }
        let clusterAnnotation = (annotation as! CCHMapClusterAnnotation)
        clusterAnnotationView!.count = clusterAnnotation.annotations.count
        clusterAnnotationView!.isUniqueLocation = clusterAnnotation.isUniqueLocation()
        annotationView = clusterAnnotationView
      }
      return annotationView
    }

ClusterAnnotationView

import Foundation
  import CCHMapClusterController
  import MapKit

  class ClusterAnnotationView : MKAnnotationView {

    var count: Int!
    var countLabel: UILabel!
    var fontSize: CGFloat = 12
    var borderWidth: CGFloat = 3
    var isUniqueLocation = false

    override init(annotation: MKAnnotation?, reuseIdentifier: String?) {
      super.init(annotation: annotation, reuseIdentifier: reuseIdentifier)

      let clusterAnnotation: CCHMapClusterAnnotation = annotation as! CCHMapClusterAnnotation
      let clusterCount = clusterAnnotation.annotations.count
      self.backgroundColor = UIColor.clearColor()
      setupLabel()
      setupCount(clusterCount)
    }

    required override init(frame: CGRect) {
      super.init(frame: frame)
    }

    required init?(coder aDecoder: NSCoder) {
      super.init(coder: aDecoder)
    }

    func setupLabel() {
      self.countLabel = UILabel(frame: bounds)
      self.countLabel.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
      self.countLabel.textAlignment = .Center
      self.countLabel.backgroundColor = UIColor.clearColor()
      self.countLabel.textColor = UIColor.whiteColor()
      self.countLabel.adjustsFontSizeToFitWidth = true
      self.countLabel.minimumScaleFactor = 2
      self.countLabel.numberOfLines = 1
      self.countLabel.font = UIFont.boldSystemFontOfSize(self.fontSize)
      self.countLabel.baselineAdjustment = .AlignCenters
      addSubview(self.countLabel)
    }

    func setupCount(count: Int) {
      self.count = count
      self.countLabel.text = "\(count)"
      self.setNeedsLayout()
    }

    func setUniqueLocation(isUniqueLocation: Bool) {
      self.isUniqueLocation = isUniqueLocation
      self.setNeedsLayout()
    }

    override func layoutSubviews() {

      var imageName = ""
      countLabel?.frame = self.bounds
      centerOffset = CGPointZero

      layer.borderColor = UIColor.whiteColor().CGColor
      layer.borderWidth = borderWidth
      layer.cornerRadius = self.bounds.size.width / 2

      if self.isUniqueLocation {
        imageName = "questionButton.png"
      } else {
        switch count {
        case 0...5:
          fontSize = 12
          imageName = "clusterSmall.png"
          borderWidth = 3

        case 6...15:
          fontSize = 13
          imageName = "clusterMedium.png"
          borderWidth = 4

        default:
          fontSize = 14
          imageName = "clusterLarge.png"
          borderWidth = 5
        }
      }
      self.image = UIImage(named: imageName)
    }

  }

[choefele]

Would you mind creating a small sample project that reproduces this problem (in Swift)? This would help me find the problem

[pkuklis]

Here you go, thanks for your help Claus!

CCHMapExampleProject.zip

[pkuklis]

Is this maybe happening due to the Bridging Header? I've also noticed that some methods like updateAnnotations are not available in my Swift project.

[choefele]

Hi @pkuklis – the only thing missing in your code example is self.mapClusterController.delegate = self in viewDidLoad (right after initialising the cluster controller) ;-)

[pkuklis]

It's always the little things, thanks @choefele :)

[Sadmansamee]

it will be very helpfull if you guys put this simple example on this repo too, swift devs will be able to see example. @pkuklis @choefele