# Podfile
use_frameworks!

target "GoogleMapsSample" do
  # Normal libraries
  pod 'GoogleMaps'
  pod 'GooglePlaces'

  abstract_target 'Tests' do
    inherit! :search_paths
    target "GoogleMapsSampleTests"
    target "GoogleMapsSampleUITests"

    pod 'Quick'
    pod 'Nimble'
  end
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['SWIFT_VERSION'] = '3.0'
    end
  end
end

// AppDelegate.swift
import UIKit
import GoogleMaps
import GooglePlaces

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

  var window: UIWindow?

  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.

    if let path = Bundle.main.path(forResource: "key", ofType: "plist") {
      if let dic = NSDictionary(contentsOfFile: path) as? [String: Any] {
        if let apiKey = dic["googleMapsApiKey"] as? String {
          GMSServices.provideAPIKey(apiKey)
          GMSPlacesClient.provideAPIKey(apiKey)
        }
      }
    }

    return true
  }
    ...
}

self.mapView.setUserTrackingMode(MKUserTrackingMode.follow, animated: true)

// ViewController.swift
import UIKit
import GoogleMaps
import GooglePlaces

class ViewController: UIViewController, GMSMapViewDelegate, CLLocationManagerDelegate {

  @IBOutlet weak var mapView: GMSMapView!
  private var locationManager: CLLocationManager?
  private var currentLocation: CLLocation?
  private var placesClient: GMSPlacesClient!
  private var zoomLevel: Float = 15.0
  /// 初期描画の判断に利用
  private var initView: Bool = false

  override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    // GoogleMapの初期化
    self.mapView.isMyLocationEnabled = true
    self.mapView.mapType = GMSMapViewType.normal
    self.mapView.settings.compassButton = true
    self.mapView.settings.myLocationButton = true
    self.mapView.delegate = self

    // 位置情報関連の初期化
    self.locationManager = CLLocationManager()
    self.locationManager?.desiredAccuracy = kCLLocationAccuracyBest
    self.locationManager?.requestAlwaysAuthorization()
    self.locationManager?.distanceFilter = 50
    self.locationManager?.startUpdatingLocation()
    self.locationManager?.delegate = self

    self.placesClient = GMSPlacesClient.shared()
  }

  override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
  }

  // MARK: CLLocationManagerDelegate
  func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    if !self.initView {
      // 初期描画時のマップ中心位置の移動
      let camera = GMSCameraPosition.camera(withTarget: (locations.last?.coordinate)!, zoom: self.zoomLevel)
      self.mapView.camera = camera
      self.locationManager?.stopUpdatingLocation()
      self.initView = true
    }
  }
}