how to make mapview zoom to 5 mile radius of current location

Use the MKCoordinateRegionMakeWithDistance function from MapKit.

Use a conversion function to convert miles to meters since MapKit uses meters.

float MilesToMeters(float miles) {    // 1 mile is 1609.344 meters    // source: http://www.google.com/search?q=1+mile+in+meters    return 1609.344f * miles;}

Then in your code set the map region as (thanks to @DylanBettermann for pointing out that to get a radius of 5 miles, the distance needs to be doubled)

mapView.region = MKCoordinateRegionMakeWithDistance(    centerCoordinate,     MilesToMeters(10.0f),    MilesToMeters(10.0f));

swift 4 version :

mapView.region = MKCoordinateRegion(            center: centerCoordinate,            latitudinalMeters: MilesToMeters(10.0f),            longitudinalMeters: MilesToMeters(10.0f))

Use the following code when ever you want to zoom to 5 miles radius:

double miles = 5.0;double scalingFactor = ABS( (cos(2 * M_PI * newLocation.coordinate.latitude / 360.0) ));MKCoordinateSpan span; span.latitudeDelta = miles/69.0;span.longitudeDelta = miles/(scalingFactor * 69.0); MKCoordinateRegion region;region.span = span;region.center = newLocation.coordinate;[mapView setRegion:region animated:YES];

[self.theMapView setRegion:MKCoordinateRegionMake(                    [theConsumer.latLong.clLocation coordinate],                     MKCoordinateSpanMake( MAP_SPAN, MAP_SPAN ))                 animated:YES];

The parameters to MKCoordinateSpanMake are in degrees, and 1 degree is approx 69 miles at the equator. Thus MAP_SPAN would be 5.0/69.0