Remove markers from google maps iOS

Question

I am building an iOS app using storyboards and Google Maps. Using iOS6

My application features the split view navigation as seen in the facebook app

On my left view I am selecting an item in a list which has lat/long cords and showing it on my map on the following method

- (void)viewWillAppear:(BOOL)animated

I would like to remove all markers in this method before I add another one (so only one marker is on the map), is there a way to do this? Below is my code to add a marker to the mapView

Thanks in advance - Jon

- (void)loadView {     GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:poi.lat                                                             longitude:poi.lon                                                                  zoom:15];     mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];      mapView.myLocationEnabled = YES;     self.view = mapView;     mapView.mapType = kGMSTypeHybrid;      //Allows you to tap a marker and have camera pan to it     mapView.delegate = self; }  -(void)viewWillAppear:(BOOL)animated {     GMSMarkerOptions *options = [[GMSMarkerOptions alloc] init];     options.position = CLLocationCoordinate2DMake(poi.lat, poi.lon);     options.title =  poi.title;     options.snippet = poi.description;     options.icon =  [UIImage imageNamed:@"flag-red.png"];     [mapView addMarkerWithOptions:options];      [mapView animateToLocation:options.position];     [mapView animateToBearing:0];     [mapView animateToViewingAngle:0]; } 

Answer 1

To remove all markers

mapView.clear() 

To remove a specific marker

myMarker.map = nil 

Answer 2

To remove all markers simple do:

[self.mapView clear];