这是我的代码：

工作方式：

CLLocationCoordinate2D sourceCoords = CLLocationCoordinate2DMake(37.7833, -122.4167);//san fransisco
MKPlacemark *sourcePlacemark = [[MKPlacemark alloc] initWithCoordinate:sourceCoords addressDictionary:nil];
MKMapItem *source = [[MKMapItem alloc] initWithPlacemark:sourcePlacemark];

// Make the destination location
CLLocationCoordinate2D destinationCoords = CLLocationCoordinate2DMake(34.0500, -118.2500);//los angeles
MKPlacemark *destinationPlacemark = [[MKPlacemark alloc] initWithCoordinate:destinationCoords addressDictionary:nil];
MKMapItem *destination = [[MKMapItem alloc] initWithPlacemark:destinationPlacemark];

不工作：

CLLocationCoordinate2D sourceCoords = CLLocationCoordinate2DMake(13.0441, +80.1831);
MKPlacemark *sourcePlacemark = [[MKPlacemark alloc] initWithCoordinate:sourceCoords addressDictionary:nil];
MKMapItem *source = [[MKMapItem alloc] initWithPlacemark:sourcePlacemark];


 Make the destination location   CLLocationCoordinate2D destinationCoords = CLLocationCoordinate2DMake(13.0545, +80.2114);
 MKPlacemark *destinationPlacemark = [[MKPlacemark alloc] initWithCoordinate:destinationCoords addressDictionary:nil]; …