UITableView bounce bottom edge only

Question

Is it possible to bounce a UITableView on the bottom side, but not the top? If so, please show me code.

score 44 · Accepted Answer · answered Apr 15 '14 at 19:23

44

Instead of changing the bounces property, I added that to the UIScrollViewDelgate method:

-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    if (scrollView.contentOffset.y<=0) {
        scrollView.contentOffset = CGPointZero;
    }
}

answered Apr 15 '14 at 19:23

Liron Berger

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5
3

This will prevent scrolling to top completely – DarkLeafyGreen Apr 12 '15 at 17:06
It would be better to set `bounds` rather than `contentOffset` to avoid calling the delegate a second time, especially if there is more code in `scrollViewDidScroll:`. – Arkku Oct 22 '15 at 11:03

abhimuralidharan · Answer 2 · 2018-04-26T07:34:14.740

8

For swift 4

extension YourViewController: UIScrollViewDelegate{
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        if scrollView == tableView {
            let a = scrollView.contentOffset
            if a.y <= 0 {
                scrollView.contentOffset = CGPoint.zero // this is to disable tableview bouncing at top.
            }
        }
    }
}

edited Apr 26 '18 at 07:34

answered May 24 '17 at 06:13

abhimuralidharan

5,752
5
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70

score 4 · Answer 3 · edited Jun 18 '13 at 11:50

4

It should be possible by observing UITableview's contentOffset property.

[_tableView addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionNew context:NULL];

. . and preventing the offset from going negative.

edited Jun 18 '13 at 11:50

Jasper Blues

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answered Jun 18 '13 at 10:56

Nazik

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1

UITableView is a sub-class of UIScrollView. . . this gives me an idea. . . observe content offset. . if it goes negative, lock back to zero. – Jasper Blues Jun 18 '13 at 11:48

score 4 · Answer 4 · answered May 18 '17 at 04:40

I have also encountered this problem and my solution is:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
 if (scrollView.contentOffset.y > 100) {
     scrollView.bounces = NO;
 }else{
     scrollView.bounces = YES;
 }
}

I use this code in my project and it work well.

score 2 · Answer 5 · answered Jun 18 '13 at 11:49

2

You could try using the UIScrollViewDelegate methods to detect dragging direction and adjust the bounces property appropriately?

answered Jun 18 '13 at 11:49

Mike Pollard

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Hi i tried observing and changed the tableview.bounces to NO accordingly when offset reaches negative but there is glitch when the tableview goes in negative. How did you avoid it , please share me your solution if it did'nt occur to you. – Mohammed Shahid Apr 10 '14 at 09:47

score 1 · Answer 6 · answered Apr 11 '21 at 09:28

Swift

func scrollViewDidScroll(_ scrollView: UIScrollView) {

     //Check to make sure this only applies to tableview 
     //and not other scrollviews inside your View/ViewController
     if scrollView.superclass == UITableView.self {
     //bounce will only be true if contentOffset.y is higher than 100
     //I set 100 just to make SURE, but you can set >= 0 too
         scrollView.bounces = scrollView.contentOffset.y > 100
     }
        
}

score 0 · Answer 7 · answered Jun 25 '16 at 13:38

0

In swift 2.2:

func scrollViewDidScroll(scrollView: UIScrollView) {
    if scrollView.contentOffset.y <= 0 {
        scrollView.contentOffset = CGPointZero
    }
}

answered Jun 25 '16 at 13:38

Jelly

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score 0 · Answer 8 · answered May 11 '17 at 09:07

-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    if (scrollView.contentOffset.y <= 0) {
        scrollView.contentOffset = CGPointZero;
        scrollView.showsVerticalScrollIndicator = NO;
    } else {
        scrollView.showsVerticalScrollIndicator = YES;
    }
}

@Liron Berger 's solution will cause VerticalScrollIndicator still showing, just set showsVerticalScrollIndicator to NO can solve this problem

UITableView bounce bottom edge only

8 Answers8

Swift

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