Publishing iOS Location Data w/ Swift and Google Maps API

1.bash

$ pod init
$ {your favorite editor} Podfile

10.swift

override func loadView() {
    // Building a view
    let screenFrame = UIScreen.mainScreen().applicationFrame
    let contentView = UIView(frame: screenFrame)
    // Add Map
    GMSServices.provideAPIKey("Insert your API Key here")
    self.mapView = GMSMapView(frame: screenFrame)
    contentView.addSubview(self.mapView)
    // Set the built view as our view
    self.view = contentView
}

11.swift

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

12.swift

class YourViewController: UIViewController, PNDelegate, GMSMapViewDelegate {

13.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)
    // Initilize the polyline
    if (self.isFirstMessage) {
        self.initializePolylineAnnotation()
        self.isFirstMessage = false
    }
    // Drawing the line
    self.updateOverlay(newLocation)
    // Update the map frame
    self.updateMapFrame(newLocation, zoom: 17.0)
    // Update Marker position
    self.updateCurrentPositionMarker(newLocation)
}

14.swift

func initializePolylineAnnotation() {
    self.polyline.strokeColor = UIColor.blueColor()
    self.polyline.strokeWidth = 5.0
    self.polyline.map = self.mapView
}

15.swift

func updateOverlay(currentPosition: CLLocation) {
    self.path.addCoordinate(currentPosition.coordinate)
    self.polyline.path = self.path
}

16.swift

func updateMapFrame(newLocation: CLLocation, zoom: Float) {
    let camera = GMSCameraPosition.cameraWithTarget(newLocation.coordinate, zoom: zoom)
    self.mapView.animateToCameraPosition(camera)
}

17.swift

func updateCurrentPositionMarker(currentLocation: CLLocation) {
    self.currentPositionMarker.map = nil
    self.currentPositionMarker = GMSMarker(position: currentLocation.coordinate)
    self.currentPositionMarker.icon = GMSMarker.markerImageWithColor(UIColor.cyanColor())
    self.currentPositionMarker.map = self.mapView
}

2.bash

platform :ios, "8.0"
target "YourProject" do
pod "PubNub", "~> 4"
pod 'Google-Maps-iOS-SDK'
end
target "YourProjectTests" do
end

3.bash

$ pod install

4.c

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

private var mapView : GMSMapView!
private var locations = [CLLocation]()
private var path = GMSMutablePath()
private var polyline = GMSPolyline()
private var currentPositionMarker = GMSMarker()
private var isFirstMessage = true