MKMapView放大缩小事件

by 伍雪颖

- (IBAction)mapZoomIn:(id)sender {    MKCoordinateRegion region = _mapView.region;    region.span.latitudeDelta=region.span.latitudeDelta * 0.4;    region.span.longitudeDelta=region.span.longitudeDelta * 0.4;    [_mapView setRegion:region animated:YES];}- (IBAction)mapZoomOut:(id)sender {    MKCoordinateRegion region = _mapView.region;    region.span.latitudeDelta=region.span.latitudeDelta * 1.3;    region.span.longitudeDelta=region.span.longitudeDelta * 1.3;    [_mapView setRegion:region animated:YES];}