Cannot put a google maps GMSMapView in a subview of main main view?

Based on other answers, here are three ways that actually work.

1. Put a view on the XIB and change its class to GMSMapView in XIB builder. See *map1 below. Or...
2. Code it all. Add the map as a subview of the main view. See *map2 below. Or...
3. Add the map as a subview of another subview already in the XIB with an outlet. *map3 below.

.h

@interface GPViewController : UIViewController@property (strong, nonatomic) IBOutlet GMSMapView *map1;@property (strong, nonatomic) IBOutlet UIView *plainViewOnXIBHoldsMap3;@end

.m

- (void)viewDidLoad{    [super viewDidLoad];    GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.0                                                        longitude:151.20                                                             zoom:6];    /* Option 1. view on XIB is class GSMMapView */    self.map1.camera = camera;    /* Option 2. add a map as a subview */    GMSMapView *map2 = [GMSMapView mapWithFrame:CGRectMake(0, 0, 100, 100) camera:camera];    [self.view addSubview:map2];    /* Option 3. add a map to a subview already on the XIB */    GMSMapView *map3 = [GMSMapView mapWithFrame:self.plainViewOnXIBHoldsMap3.bounds camera:camera];    [self.plainViewOnXIBHoldsMap addSubview:map3];}

Have checked out and get working in Swift 2.0 all of the three options provided by cloudsurfin. Translating his answer for those who face the same problem in Swift 2.0:

Option1 - Put a view on the XIB and change its class to GMSMapView in XIB builder.

Option2 - Code it all. Add the map as a subview of the main view.

Option3 - Add the map as a GMSMapView subview of already existing UIView subview.

Explanation of preparations in XIB for Option1:

1) Set a class for your view:

2) Don't forget to connect your view with the outlet in code:

import UIKitimport GoogleMapsclass MapViewController: UIViewController {    @IBOutlet weak var map1 : GMSMapView!    @IBOutlet weak var map3 : UIView!    override func viewDidLoad() {        super.viewDidLoad()        let camera = GMSCameraPosition.cameraWithLatitude(53.9,        longitude: 27.5667, zoom: 6)        // Option 1. view on XIB is class GSMMapView        self.map1.camera = camera;        // Option 2. add a map as a subview        let map2 = GMSMapView.mapWithFrame(CGRectMake(0, 64, 320, 460), camera:camera)        self.view.addSubview(map2)        // Option 3. add a map to a subview of UIView class that is already on the XIB        let map3 = GMSMapView.mapWithFrame(self.plainViewOnXIBHoldsMap3.bounds, camera:camera)        self.plainViewOnXIBHoldsMap3.addSubview(map3)    }}

Hope this note helps someone :)

My suggestions:

1. Link the UIView from your storyboard to your header file as a UIView instance variable, not a GMSMapView
2. Change the mapWithFrame:camera: method to be set to your linked UIView's bounds
3. At the end of the viewDidLoad: method, set the UIView instance variable to your GMSMapView, or add a subview. I've had trouble with this as well, and fooling around with this usually will work.

.h

@interface MapViewController: UIViewController <CLLocationManagerDelegate>{    IBOutlet UIView *mapViewOnSreen;}

.m

- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.    GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.8683                                                                longitude:151.2086                                                                     zoom:10];    _mapView = [GMSMapView mapWithFrame:mapViewOnScreen.bounds camera:camera];    _mapView.myLocationEnabled = YES;    mapViewOnScreen = _mapView    //OR [self.view addSubview:_mapView];    //OR [mapViewOnScreen addSubview:_mapView];   <--This worked for me}

*Edit: I created a small UIView inside the main view using IB. I followed the steps listed and I was able to view the map inside the small UIView when I set [mapViewOnScreen addSubview:_mapView];