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L'image ci-joint est ce qui arrive parfois lorsque je tente de la taille d'un MKMapView pour s'adapter à un ou plusieurs repères. C'est intermittent, mais l'affichage est toujours exactement dans la même position.
Voici le code:
// loc1 is always non-null, and is equal to one of the annotation locations
CLLocationCoordinate2D topLeftCoord = loc1.coordinate;
CLLocationCoordinate2D bottomRightCoord = loc1.coordinate;
for(UserPlacemark* annotation in self.mapView.annotations)
{
topLeftCoord.longitude = fmin(topLeftCoord.longitude, annotation.coordinate.longitude);
topLeftCoord.latitude = fmax(topLeftCoord.latitude, annotation.coordinate.latitude);
bottomRightCoord.longitude = fmax(bottomRightCoord.longitude, annotation.coordinate.longitude);
bottomRightCoord.latitude = fmin(bottomRightCoord.latitude, annotation.coordinate.latitude);
}
MKCoordinateRegion region;
double k = 0.01;
region.center.latitude = topLeftCoord.latitude - (topLeftCoord.latitude - bottomRightCoord.latitude) * 0.25;
region.center.longitude = topLeftCoord.longitude + (bottomRightCoord.longitude - topLeftCoord.longitude) * 0.5;
region.span.latitudeDelta = k + fabs(topLeftCoord.latitude - bottomRightCoord.latitude) * 1.25; // Add a little extra space on the sides
region.span.longitudeDelta = k + fabs(bottomRightCoord.longitude - topLeftCoord.longitude) * 1.5; // Add a little extra space on the sides
// only zoom if region doesn't fit, or too small
CGRect newRect = [mapView convertRegion:region toRectToView:mapView];
double MIN_SIZE_PIXELS = 50.0;
double rectSizePixels = newRect.size.width+newRect.size.height;
if (!CGRectContainsRect(mapView.bounds, newRect) || rectSizePixels < MIN_SIZE_PIXELS)
{
region = [mapView regionThatFits:region];
[mapView setRegion:region animated:TRUE];
}