Google Maps and Google places with swift UIKit

3- AppDelegate:

In the AppDelegate.swift file:

import GoogleMaps
import GooglePlaces

in the function:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool  

add the following lines for maps and places:

GMSServices.provideAPIKey("YOUR_API_KEY")
GMSPlacesClient.provideAPIKey("YOUR_API_KEY")
return true

4- In the ViewController, we have all the codes, risking a bloated file

🙁

import GoogleMaps
import GooglePlaces

In the ViewController class we add functions and variables to manage the place and the maps:

var locationManager: CLLocationManager!
var currentLocation: CLLocation?
var mapView: GMSMapView!
var placesClient: GMSPlacesClient!
var preciseLocationZoomLevel: Float = 15.0
var approximateLocationZoomLevel: Float = 10.0
var likelyPlaces:[Any] = []

Since we will need a collection to represent the places we also add:

let collectionView: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        layout.scrollDirection = .horizontal
        let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
        cv.translatesAutoresizingMaskIntoConstraints = false
        cv.register(PlaceCell.self, forCellWithReuseIdentifier: "cell")
        return cv
    }()

In the function override func viewDidLoad() we have this for the mapView and collectionview:

// Do any additional setup after loading the view.
        // Create a GMSCameraPosition that tells the map to display the
        // coordinate -33.86,151.20 at zoom level 6.
        // Initialize the location manager.
        
        locationManager = CLLocationManager()
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestWhenInUseAuthorization()
        locationManager.distanceFilter = 50
        locationManager.startUpdatingLocation()
        locationManager.delegate = self

        placesClient = GMSPlacesClient.shared()
              
        // A default location to use when location permission is not granted.
        let defaultLocation = CLLocation(latitude: -33.869405, longitude: 151.199)

        // Create a map.
        let zoomLevel = locationManager.accuracyAuthorization == .fullAccuracy ? preciseLocationZoomLevel : approximateLocationZoomLevel
        let camera = GMSCameraPosition.camera(withLatitude: defaultLocation.coordinate.latitude,
                                              longitude: defaultLocation.coordinate.longitude,
                                              zoom: zoomLevel)
        mapView = GMSMapView.map(withFrame: view.bounds, camera: camera)
        mapView.settings.myLocationButton = true
        mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        mapView.isMyLocationEnabled = true

        // Add the map to the view, hide it until we've got a location update.

        view.addSubview(collectionView)
        //vStack.addArrangedSubview(collectionView)
        collectionView.backgroundColor = .darkGray
        collectionView.delegate = self
        collectionView.dataSource = self



        collectionView.bottomAnchor.constraint(greaterThanOrEqualTo: view.bottomAnchor, constant: -40).isActive = true
        collectionView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 40).isActive = true
        collectionView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -40).isActive = true
        collectionView.heightAnchor.constraint(equalToConstant: view.frame.width/2).isActive = true
        
        mapView.translatesAutoresizingMaskIntoConstraints = false
        
        
        mapView.heightAnchor.constraint(equalToConstant: 600).isActive = true
        mapView.widthAnchor.constraint(equalToConstant: 400).isActive = true
        
        
        listLikelyPlaces()
        
        
        view.addSubview(mapView)
        mapView.isHidden = true

We also add an extension to ViewController where the function ListLikelyPlaces() is designed to fetch places, we change this function by having it append the results to likelyPlaces (remember var likelyPlaces:[Any] = [] was defined earlier).

We use a dispatchQueue to reload the collection data. As an exercise try to see what happens if you eliminate the dispacthQueue (and do not remove the codes inside).