Detect zoom on GMSMapView (iOS)

Question

How can I find if the user zoomed in/out on my mapView (GMSMapView)?

I want to do that if the zoom is bigger than 14 all the markers on the map will disappear and if it's smaller all the markers will reload.

How can I do that?

Thanks!

Answer 1

The below code assumes that the view controller has a property of "markerArray" which holds all of the markers.

-(void)mapView:(GMSMapView *)mapView didChangeCameraPosition:(GMSCameraPosition*)position {
    int zoom= mapView.camera.zoom;
    if (zoom < 14) {
        [mapView_ clear];
    }
    else{
        [self displayAllMarkers];
    }
}


-(void) displayAllMarkers{
    for (BarObject *barMarker in markerArray){
        GMSMarker *marker = [[GMSMarker alloc] init];
        marker.position = barMarker.location; //
        marker.icon = [GMSMarker markerImageWithColor:[UIColor blackColor]];
        marker.map = mapView_;
    }
 }