My recursive description (iOS/OSX)(ARC/ManualMemoryManagement)

gistfile1.m

#if TARGET_OS_IPHONE
@interface UIView (RecursiveDescription)
#else
@interface NSView (RecursiveDescription)
#endif
#ifdef DEBUG
- (NSString*)_recursiveDescription;
#endif
@end

#if TARGET_OS_IPHONE
@implementation UIView (RecursiveDescription)
#else
@implementation NSView (RecursiveDescription)
#endif

- (NSString*)_recursiveDescription
{
    return _recursiveDescription(self, 0);
}

NSString* _recursiveDescription(id view, NSUInteger depth)
{
    NSMutableString* subviewsDescription;
    subviewsDescription = [NSMutableString string];
    for (id v in [view subviews]) {
        [subviewsDescription appendString:_recursiveDescription(v, depth+1)];
    }
    
    NSMutableString* layout;
    layout = [NSMutableString string];
    for (int i = 0; i < depth; i++) {
        [layout appendString:@"   | "];
    }
    
    return [NSString stringWithFormat:@"%@%@\n%@", layout, [view description], subviewsDescription];
}

@end