ios - MapKit，设置视图

Question

所以我设置了一些调试来记录visibleMapRect我更改地图视图时的情况。当我以我想要的方式获得视图时，我记下了这些值，并在viewDidLoad我将 mapView 设置为该矩形。然而，它的看法不一样。它被缩小得更多，所以我正在看的是在屏幕上居中，但屏幕上也有更多。

如何将 mapView 设置为与我设置的相同？

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    MKMapRect mRectHawaii;
    mRectHawaii.origin.x = 16077095.369230;
    mRectHawaii.origin.y = 117612734.225784;
    mRectHawaii.size.width = 698548.708173;
    mRectHawaii.size.height = 393548.573271;

    [self.mapView setVisibleMapRect:mRectHawaii animated:NO];
}


- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
    MKMapRect mRect = mapView.visibleMapRect;

    NSLog(@"(%f, %f) (%f, %f)", mRect.origin.x, mRect.origin.y, mRect.size.width, mRect.size.height);
}

Answer 1

 MKMapRect zoomRect = MKMapRectNull;


        MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
        MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0.1, 0.1);
        if (MKMapRectIsNull(zoomRect)) {
            zoomRect = pointRect;
        }else{
            zoomRect = MKMapRectUnion(zoomRect, pointRect);
        }
    }

    [[self mapview] setVisibleMapRect:zoomRect edgePadding:UIEdgeInsetsMake(50, 50, 50, 50) animated:YES];