如何添加2英里到viewRegion.span.latitudeDelta?我如何計算kTwoMiles?如何添加2英里到viewRegion.span.latitudeDelta?
MKCoordinateRegion viewRegion;
viewRegion.center = coordinateCentre;
viewRegion.span.latitudeDelta = latitudeMax - latitudeMin + kTwoMiles;
viewRegion.span.longitudeDelta = longitudeMax - longitudeMin + kTwoMiles;
MKCoordinateRegion adjustedRegion = [mapView regionThatFits:viewRegion];
[mapView setRegion:adjustedRegion animated:YES];
我喜歡這個解決方案,因爲它非常直截了當:http://stackoverflow.com/a/13611163/149231 – motto