ios - 如何在iOS 7中缩小mkmapview的负载

Question

我拥有的这段代码适用于iOS 6，但似乎对iOS 7无效。如何设置跨度不起作用时，如何使其适用于iOS 7？

CLLocationCoordinate2D  ctrpoint = self.location.coordinate;


MapPoint *mp = [[MapPoint alloc] initWithCoordinate:ctrpoint title:[NSString stringWithFormat:@"%@: %@",NSLocalizedString(@"Pin Name:", @"Pin Name:"),self.pin.name] subtitle:self.pin.cell];
[self.mapView addAnnotation:mp];



MKCoordinateSpan span;

span.latitudeDelta = 0.2;
span.longitudeDelta = 0.2;

MKCoordinateRegion region;
region.span = span;
region.center = self.location.coordinate;

[self.mapView setRegion:region animated:YES];

Answer 1

正确的方法是使用提供的常量:

- (MKCoordinateRegion)regionForWorld {
    return MKCoordinateRegionForMapRect(MKMapRectWorld);
}

所以

- (void)zoomToWorldAnimated:(BOOL)animated {
    MKCoordinateRegion region = [self regionForWorld];
    [self.mapView setRegion:region animated:animated];
}