如何围绕MKAnnotation数组围绕UIMapView？

Question

如何将UIMapView围绕array的MKAnnotation？

Answer 1

首先从您的注释数组中找到最小和最大经度和纬度。然后你可以设置区域：

MKCoordinateRegion extents; 
extents.center.latitude = (maxLat + minLat)/2.0; 
extents.center.longitude = (maxLong + minLong)/2.0; 
extents.span.latitudeDelta = (maxLat - minLat); 
extents.span.longitudeDelta = (maxLong - minLong); 
MKCoordinateRegion fittedRegion = [mapView regionThatFits:extents]; 
[mapView setRegion:fittedRegion animated:YES];