Latest 1.0.1
Homepage https://github.com/freemiumdev/FBAnnotationClusteringSwift
License MIT
Platforms ios 8.0, requires ARC
Authors

This is a Swift translation of FBAnnotationClustering. Aggregates map pins into a single numbered cluster.

Map clustering is a common enough map feature in modern apps. When I couldn’t find a Swift library, I ended up translating one from Objective-C. The library of choice was FBAnnotationClustering (FB stands for Filip Bec, not Facebook). I wanted something that was fast (QuadTree), with a light code base in case I had to figure out and troubleshoot an edge case down the road.

Simulator Image

(left: sample project with a lot of pins in the DC area. right: ribl screenshot using clusters)

Installation

CocoaPods

pod 'FBAnnotationClusteringSwift'

and in class where do you need add this

import FBAnnotationClusteringSwift

Manually

Copy the following Swift files to your project:

  • FBClusteringManager.swift
  • FBAnnotationCluster.swift
  • FBAnnotationClusterView.swift
  • FBAnnotation.swift
  • FBQuadTree.swift
  • FBQuadTreeNode.swift
  • FBBoundingBox.swift

Usage

Use FBViewController.swift as a guide. For demonstration purposes, it drops 1000 random pins near Ghana.

Follow instructions below for a barely-working implementation.

Step 1: Get a handle to the clustering manager

let clusteringManager = FBClusteringManager()

Step 2: Feed pins into the clustering manager

var array:[FBAnnotation] = []

// drop two arbitrary pins somewhere near Louisville, Kentucky
let pinOne = FBAnnotation()
pinOne.coordinate = CLLocationCoordinate2D(latitude: 38.188805, longitude: -85.6767705)

let pinTwo = FBAnnotation()
pinTwo.coordinate = CLLocationCoordinate2D(latitude: 38.188806, longitude: -85.6767707)

array.append(pinOne)
array.append(pinTwo)

clusteringManager.addAnnotations(array)

Step 3: Wire up your map

Add this to the top of your ViewController:

import MapKit

Add a MapKit View in the Storyboard, and set the delegate.

Step 4: Return either a cluster or a pin in the MKMapViewDelegate

Drop in these MKMapViewDelegate methods:

extension ViewController: MKMapViewDelegate {

    func mapView(mapView: MKMapView!, regionDidChangeAnimated animated: Bool){
        NSOperationQueue().addOperationWithBlock({
            let mapBoundsWidth = Double(self.mapView.bounds.size.width)
            let mapRectWidth:Double = self.mapView.visibleMapRect.size.width
            let scale:Double = mapBoundsWidth / mapRectWidth
            let annotationArray = self.clusteringManager.clusteredAnnotationsWithinMapRect(self.mapView.visibleMapRect, withZoomScale:scale)
            self.clusteringManager.displayAnnotations(annotationArray, onMapView:self.mapView)
        })
    }

    func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
        var reuseId = ""
        if annotation.isKindOfClass(FBAnnotationCluster) {
            reuseId = "Cluster"
            var clusterView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId)
            clusterView = FBAnnotationClusterView(annotation: annotation, reuseIdentifier: reuseId, options: nil)
            return clusterView
        } else {
            reuseId = "Pin"
            var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId) as? MKPinAnnotationView
            pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
            pinView!.pinColor = .Green
            return pinView
        }
    }

}

For image’s cluster
You can use those provided by me, or you can pass the name of the image you have in your project. Remember you will need 3 different images depending on the cluster size

Run Example

If you want run example, before to open Xcode the first time, open Terminal in Example folder and run the command:

pod  install

After than open the .xworkspace file generated.

Latest podspec

{
    "name": "FBAnnotationClusteringSwift",
    "version": "1.0.1",
    "summary": "This is a Swift translation of FBAnnotationClustering. Aggregates map pins into a single numbered cluster.",
    "description": "Swift translation of FB Annotation Clustering, which clusters pins on the map for iOS. http://ribl.co/blog/2015/05/28/map-clustering-with-swift-how-we-implemented-it-into-the-ribl-ios-app/",
    "homepage": "https://github.com/freemiumdev/FBAnnotationClusteringSwift",
    "license": "MIT",
    "authors": {
        "Giuseppe Russo": "[email protected]"
    },
    "source": {
        "git": "https://github.com/freemiumdev/FBAnnotationClusteringSwift.git",
        "tag": "1.0.1"
    },
    "platforms": {
        "ios": "8.0"
    },
    "requires_arc": true,
    "source_files": "Pod/Classes/**/*",
    "resources": [
        "Pod/Assets/*.xcassets"
    ]
}

Pin It on Pinterest

Share This