marker is not showing on google map

Question

I am using GoogleMap SDK in iOS to display user's current location. Google map is showing on my view but marker is not visible. I don't know what I am doing wrong here.

Here is my code

#import <GoogleMaps/GoogleMaps.h>
@interface firstViewController () {
   // GMSMapView *mapView_;
    IBOutlet GMSMapView *mapView_;
}
@end

@implementation firstViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // 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:6];
    mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];
    mapView_.myLocationEnabled = NO;
    [self.view addSubview: 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

Why are you setting your map with CGRectZero frame??

mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];
mapView_.myLocationEnabled = NO;
[self.view addSubview: mapView_];

The map will not be visible if you set it's frame to CGRectZero. So first, try making your mapView visible by giving it a different frame.