Увеличение:
- (IBAction) zoomInClicked:(id)sender
{
// when zoom button is clicked, zoom on a specific region
// make region for the map to show as zoom in
[myMapView setRegion:region animated:YES];
}
Уменьшение:
- (IBAction)zoomOutClicked:(id)sender
{
// make region for the map to show as zoom out
[mapView setRegion:region animated:YES];
}