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UIScrollView on scroll update method

Is there a way / ability to trigger a function on scroll scrolling?

i found scrolling start and scrolling end solutions, but nothing like onIsScrolling ...

Is there a built-in solution? or a better workaround (nstimer)?

thanks alex

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2 answers


UIScrollViewDelegate

provides the following:

– scrollViewDidScroll:
– scrollViewWillBeginDragging:
– scrollViewDidEndDragging:willDecelerate:
– scrollViewShouldScrollToTop:
– scrollViewDidScrollToTop:
– scrollViewWillBeginDecelerating:
– scrollViewDidEndDecelerating:


in particular:

– scrollViewDidScroll:
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Thanks a lot for the scrollViewDidScroll tip. sample trial implementation:

@interface YourClass : UIViewController  <UIScrollViewDelegate>
{
    UIScrollView    *theView;
}

@end


in the .m file:

- (void)loadView 
{
    theView = [[UIScrollView alloc] initWithFrame:
CGRectMake(0, 10, 300, 300)];
    theView.delegate = self;

    [self.view addSubview:theView];

    theView.contentSize = CGSizeMake(500, 500); 
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    NSLog(@"SCROLL SCROLL SCROLL YOUR BOAT");
}
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