如何圍繞MKAnnotation數組圍繞UIMapView？

Question

如何將UIMapView圍繞array的MKAnnotation？

Answer 1

首先從您的註釋數組中找到最小和最大經度和緯度。然後你可以設置區域：

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];