GMSMarker points not being shown - ios

Question

I have a viewcontroller in a storyboard with a View in it that loads googlemaps. Markers are however, not showing up!
What have I done wrong?
Here is my code.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self createBasicGSMView];
}
- (IBAction)AddPointButtonPressed:(id)sender {
// Creates a marker in the center of the map.
GMSMarker *CurrentLocationMarker = [[GMSMarker alloc] init];
CLLocation *CurrentLocationNote = mapView_.myLocation;
CurrentLocationMarker.position = CLLocationCoordinate2DMake(CurrentLocationNote.coordinate.latitude, CurrentLocationNote.coordinate.longitude);
CurrentLocationMarker.title = #"Current Location";
CurrentLocationMarker.snippet = #"This is the place to be";
[CurrentLocationMarker setMap:mapView_];
}
- (void) createBasicGSMView{
// Create a GMSCameraPosition that tells the map to display the
// coordinate -33.86,151.20 at zoom level 6.
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.86
longitude:151.20
zoom:1];
mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];
mapView_.myLocationEnabled = YES;
self.mapViewHolder = mapView_;
// Creates a marker in the center of the map.
GMSMarker *marker = [[GMSMarker alloc] init];
marker.position = CLLocationCoordinate2DMake(-33.86, 151.20);
marker.title = #"Sydney";
marker.snippet = #"Australia";
marker.map = mapView_;
}

Answer 1

Figured it out. had to add the view as a subview:
[self.view addSubview:mapView_];
Doesnt work otherwise!