AppKit autoscroll implemented in UIKit

Autoscroll.m

@interface UIView (Autoscroll)
- (void)autoscroll:(UITouch*)touch;
@end

@implementation UIView (Autoscroll)
- (void)autoscroll:(UITouch*)touch
{
    // Pass the autoscroll messages onto the superview until it reaches a view that handles the message
    // If you want to pass the messages through the responder chain then this category would need to be 
    // implemented on UIResponder instead of UIView and you would call [self.nextResponder autoscroll:touch]
    [self.superview autoscroll:touch];
}
@end

@interface UIScrollView (Autoscroll)
@end

@implementation UIScrollView (Autoscroll)
- (void)autoscroll:(UITouch*)touch
{
    // UIScrollView handles the autoscroll message
    CGPoint location = [touch locationInView:self];
    CGRect scrollRect = CGRectMake(location.x, location.y, 10.f, 10.f);
    [self scrollRectToVisible:scrollRect animated:NO];
}
@end

// Usage: just call -autoscroll: in -touchesMoved:
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self autoscroll:[touches anyObject]];
}