iOS UIScrollView - position of scroll bars

[john903]

Is there a way to get the position of the scroll bars in a UIScrollView?

 

[Niiro13]

Not that I know of.

But the scrollers to screen should be the same relation as the center of the scrollview is to its content.

 

[PhoneyDeveloper]

There are no scroll bars in a scrollview. I think what you want are contentOffset and setContentOffset:

 

[john903]

Yes. That's what I want! I'm trying to find this out in the scrollViewDidScroll method in my UIScrollViewDelegate. I did this but point returned is always {0,0}. Do you know what I'm doing wrong? Thanks!

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
	CGPoint point = [scrollView contentOffset];
}

 

[PhoneyDeveloper]

Don't know what you're doing wrong. How do you know the value of the point? Probably the x value will always be 0. y should change. This works for me:

- (void)scrollViewDidScroll:(UIScrollView *)inscrollView
{
	CGPoint	p = inscrollView.contentOffset;
	
	NSLog(@"x = %f, y = %f", p.x, p.y);
}

I get results like:

2008-09-22 21:04:16.122 ScrollViewTest[29247:20b] x = 0.000000, y = 13.000000
2008-09-22 21:04:16.138 ScrollViewTest[29247:20b] x = 0.000000, y = 29.000000
2008-09-22 21:04:16.155 ScrollViewTest[29247:20b] x = 0.000000, y = 47.000000
2008-09-22 21:04:16.172 ScrollViewTest[29247:20b] x = 0.000000, y = 63.000000

 

[john903]

Ah, Thanks! I was printing the values out using "%d". Works now!