Custom infobox when tap event - ios

Question

I'm trying to have an info box, same one as the standard for markers, to appear when a my polyline is tapped. I've gotten a NSLog to output when the line is tapped, but now I need to have the infobox appear instead of the NSLog. I've seen some Javascript examples but no objective c ones.
- (void)loadView {
// Create a GMSCameraPosition
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:37.551927
longitude:-77.456292
zoom:18];
GMSMapView *mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
CLLocationCoordinate2D position = CLLocationCoordinate2DMake(37.551709, -77.456510);
mapView.settings.myLocationButton = YES;
mapView.myLocationEnabled = YES;
self.view = mapView;
mapView.delegate = self;
GMSMutablePath *path = [GMSMutablePath path];
[path addCoordinate:CLLocationCoordinate2DMake(37.552243, -77.457415)];
[path addCoordinate:CLLocationCoordinate2DMake(37.551054, -77.455443)];
GMSPolyline *polyline = [GMSPolyline polylineWithPath:path];
UILabel *myLabel = [[UILabel alloc] init];
UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(labelTapped)];
tapGestureRecognizer.numberOfTapsRequired = 1;
[myLabel addGestureRecognizer:tapGestureRecognizer];
myLabel.userInteractionEnabled = YES;
polyline.spans = #[[GMSStyleSpan spanWithColor:[UIColor greenColor]]];
polyline.strokeWidth = 5.f;
polyline.tappable = true;
polyline.map = mapView;
}
- (void)mapView:(GMSMapView *)mapView didTapOverlay:(GMSOverlay *)overlay
{
NSLog(#"in didTapOverlay");
}
#end

Answer 1

Check the Events guide from the iOS Maps tutorial.
Here's a snippet in Objective-C:
- (void)loadView {
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:1.285
longitude:103.848
zoom:12];
GMSMapView *mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
mapView.delegate = self;
self.view = mapView;
}
#pragma mark - GMSMapViewDelegate
- (void)mapView:(GMSMapView *)mapView
didTapAtCoordinate:(CLLocationCoordinate2D)coordinate {
NSLog(#"You tapped at %f,%f", coordinate.latitude, coordinate.longitude);
}
Here's an SO thread demonstrating the use of GMSMapViewDelegate:
1.conform to the GMSMapViewDelegate protocol.
#interface YourViewController () <GMSMapViewDelegate>
// your properties
#end
2.set your mapView_ delegate.
mapView_.delegate = self;
3.implement the GMSMapViewDelegate method
- (void)mapView:(GMSMapView *)mapView didTapInfoWindowOfMarker:(GMSMarker *)marker {
// your code
}
Addition: marker.userData is useful. you can set your needed data into it and use it in - mapView:didTapInfoWindowOfMarker: