MKMapView: relocating Google-Image and Copyright-Label

gistfile1.m

//example relocation implementation
- (void) relocate:(MKMapView*)map {
    UIImageView *google = [self googleImageForMapView:map];
    CGRect googleFrame =  CGRectMake(google.frame.origin.x, 10.0, google.frame.size.width, google.frame.size.height);
    [google setFrame:googleFrame];
    
    UILabel *copyright = [self copyrightLabelForMapView:map];
    CGRect copyrightFrame = CGRectMake(copyright.frame.origin.x, 10.0, copyright.frame.size.width, copyright.frame.size.height);
    [copyright setFrame:copyrightFrame];
}


//get single UILabel or nil
- (UILabel*) copyrightLabelForMapView:(MKMapView*)mapView {
    NSArray *labels = [self subviewsOfClass:[UILabel class] containedIn:mapView];
    return labels.count>0 ? [labels objectAtIndex:0] : nil;
}


//get single UIImageView or nil
- (UIImageView*) googleImageForMapView:(MKMapView*)mapView {
    NSArray *images = [self subviewsOfClass:[UIImageView class] containedIn:mapView];
    return images.count>0 ? [images objectAtIndex:0] : nil;
}

//find all subviews of a given class (recursive-> finds sub..sub..subviews until there are none!)
- (NSArray*) subviewsOfClass:(Class)class containedIn:(UIView*)rootView {
    NSMutableArray *matchingSubviews = [[[NSMutableArray alloc] init] autorelease];
    
        for (UIView *view in [rootView subviews]) {
            if ([view isKindOfClass:class]) {
                [matchingSubviews addObject:view];
            }
                
            NSArray *matchingSubviewsFromSubcall = [self subviewsOfClass:class containedIn:view];
            [matchingSubviews addObjectsFromArray:matchingSubviewsFromSubcall];
        }
    
    return matchingSubviews;

}