Tracking Location Data for iOS w/ Swift and MapKit

1.bash

$ pod init
$ {your favorite editor} Podfile

10.swift

private var mapView = MKMapView()
private var locations = [CLLocation]()
private var coordinateList = [CLLocationCoordinate2D]()
private var isFirstMessage = Bool()

11.swift

override func loadView() {
    // Building a view
    let screenFrame = UIScreen.mainScreen().applicationFrame
    let contentView = UIView(frame: screenFrame)
    // Add Map
    self.mapView = MKMapView(frame: screenFrame)
    contentView.addSubview(self.mapView)
    // Set the built view as our view
    self.view = contentView
}

12.swift

override func viewDidLoad() {
    self.mapView.delegate = self
}

13.swift

class YourViewController: UIViewController, PNDelegate, MKMapViewDelegate {

14.swift

func pubnubClient(client: PubNub!, didReceiveMessage message: PNMessage!) {
    // Extract content from received message
    let receivedMessage = message.message as [NSString : Double]
    let lng : CLLocationDegrees! = receivedMessage["lng"]
    let lat : CLLocationDegrees! = receivedMessage["lat"]
    let alt : CLLocationDegrees! = receivedMessage["alt"]
    let newLocation2D = CLLocationCoordinate2DMake(lat, lng)
    let newLocation = CLLocation(coordinate: newLocation2D, altitude: alt, horizontalAccuracy: 0, verticalAccuracy: 0, timestamp: nil)
    self.locations.append(newLocation)
    self.coordinateList.append(newLocation.coordinate)
    // Drawing the line
    self.updateOverlay()
    // Focusing on the new position
    self.updateMapFrame()
    // Update Marker Position
    self.updateCurrentPositionMarker(newLocation)
}

15.swift

func updateOverlay() {
    // Build the overlay
    let line = MKPolyline(coordinates: &self.coordinateList, count: self.coordinateList.count)
    // Replace overlay
    if !self.isFirstMessage {
        self.mapView.removeOverlays(self.mapView.overlays)
    }
    self.mapView.addOverlay(line)
}

16.swift

func updateMapFrame() {
    let currentPosition = self.locations.last!
    let latitudeSpan = CLLocationDistance(500)
    let longitudeSpan = latitudeSpan
    let region = MKCoordinateRegionMakeWithDistance(currentPosition.coordinate, latitudeSpan, longitudeSpan)
    self.mapView.setRegion(region, animated: true)
}

17.swift

func updateCurrentPositionMarker(currentLocation: CLLocation) {
    self.currentPositionMarker.coordinate = currentLocation.coordinate
    self.mapView.addAnnotation(self.currentPositionMarker)
}

2.bash

platform :ios, "8.0"
target "YourProject" do
pod 'PubNub', '3.7.2'
end
target "YourProjectTests" do
end

3.bash

$ pod install

4.c

#ifdef __OBJC__
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import "PNImports.h"
#endif

5.swift

private var channel = PNChannel()
private let config = PNConfiguration(publishKey: "publish_key", subscribeKey: "subscribe_key", secretKey: nil)

6.swift

PubNub.setDelegate(self)
PubNub.setConfiguration(self.config)
PubNub.connect()
self.channel = PNChannel.channelWithName("Channel-Name", shouldObservePresence: false) as PNChannel
PubNub.subscribeOnChannel(self.channel)

7.swift

class YourViewController: UIViewController, PNDelegate {

8.swift

func pubnubClient(client: PubNub!, didReceiveMessage message: PNMessage!) {
    // Extract content from received message
    let receivedMessage = message.message as [NSString : Double]
    let lng : CLLocationDegrees! = receivedMessage["lng"]
    let lat : CLLocationDegrees! = receivedMessage["lat"]
    let alt : CLLocationDegrees! = receivedMessage["alt"]
}

9.swift

import MapKit