How to make custom UIView OR label on GMSMarker Google - ios

Question

I have to add a custom label on Marker pin of Google maps in IOS.
I have already implemented markerInfoWindow method. But it works after i tapped on marker/Pin.
I need to show custom label at start as long as mapview will load on view without performing any action. As we can set icon or title on the marker, I need to show my own Custom view on it.
- (UIView *)mapView:(GMSMapView *)mapView markerInfoWindow:(GMSMarker *)marker {
CLLocationCoordinate2D anchor = marker.position;
// CGPoint point = [mapView.projection pointForCoordinate:anchor];
// self.calloutView.title = marker.title;
[self.calloutView setFrame:CGRectMake(0, 50, 25, 25)];
self.calloutView.layer.cornerRadius = 11.0;
self.calloutView.layer.masksToBounds = YES;
self.calloutView.layer.borderColor = [UIColor clearColor].CGColor;
self.calloutView.layer.borderWidth = 0.0;
self.calloutView.hidden = NO;
return self.calloutView;
}

Answer 1

Use this code to add an image for GMSMarker:
GMSMarker *marker = [[GMSMarker alloc] init];
marker.position = MARKER_POSITION;
marker.infoWindowAnchor = CGPointMake(0.44f, 0.45f);
marker.icon = [UIImage imageNamed:#"CustomMarkerImageName"];
You can also use this delegate method to provide custom view for additional info:
- (UIView *)mapView:(GMSMapView *)mapView markerInfoWindow:(GMSMarker *)marker {
InfoWindow *view = [[[NSBundle mainBundle] loadNibNamed:#"InfoWindow" owner:self options:nil] objectAtIndex:0];
view.name.text = #"Place Name";
view.description.text = #"Place description";
view.phone.text = #"123 456 789";
view.placeImage.image = [UIImage imageNamed:#"customPlaceImage"];
view.placeImage.transform = CGAffineTransformMakeRotation(-.08);
return view;
}
Check this answer as a reference: https://stackoverflow.com/a/16767124/2082569

Answer 2

If I understand correctly, the ask is to show the info window for a particular marker programmatically.
[self.mapView setSelectedMarker:marker];
To achieve camera refocus similar to if a user had tapped the marker, do something like:
GMSCameraPosition *cameraPosition =
[[GMSCameraPosition alloc] initWithTarget:marker.position
zoom:15
bearing:0
viewingAngle:0];
[self.mapView animateToCameraPosition:cameraPosition];