IOS: random paging scrollview

I have this code for a scrollView (with paging enabled)

-开发者_如何学运维 (IBAction) random{
CGRect frame = scrollView.frame;
frame.origin.x = frame.size.width * (arc4random() % (numberOfPage - 1));
frame.origin.y = 0;
[scrollView scrollRectToVisible:frame animated:YES];}

It make a random paging scroll and it's ok, but it is very slow. Can I have a fast scrolling as a slot machine?

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I'm not sure you could get it to look like slot machine (you'd probably need some motion blur to get that kind of effect), but you could try putting your scrollRectToVisible: in an animation block to change the duration of the animation:

- (IBAction) random 
{
    CGRect frame = scrollView.frame;
    frame.origin.x = frame.size.width * (arc4random() % (numberOfPage - 1));
    frame.origin.y = 0;

    [UIView animateWithDuration: <your duration>
                     animations:^(void) {
                         [scrollView scrollRectToVisible:frame animated: NO];
                     }];
}

Don't forget the animated:NO, otherwise it'll override your duration