Disabling vertical scrolling in UIScrollView

问题:

There is an option in IB to uncheck vertical scrolling on a scrollview, but it doesnt seem to work.

How can the scrollview be set to only scroll horizontally, and not vertically in the code rather than IB?

回答1:

Try setting the contentSize's height to the scrollView's height. Then the vertical scroll should be disabled because there would be nothing to scroll vertically.

scrollView.contentSize = CGSizeMake(scrollView.contentSize.width,scrollView.frame.size.height);

回答2:

since iOS7:

first: the content size width must be equal to the width of your scrollview

second: in your initWithNibName:

self.automaticallyAdjustsScrollViewInsets = NO;

That´s it.

回答3:

yes, pt2ph8's answer is right,

but if for some strange reason your contentSize should be higher than the UIScrollView, you can disable the vertical scrolling implementing the UIScrollView protocol method

 -(void)scrollViewDidScroll:(UIScrollView *)aScrollView;

just add this in your UIViewController

float oldY; // here or better in .h interface

- (void)scrollViewDidScroll:(UIScrollView *)aScrollView
{
    [aScrollView setContentOffset: CGPointMake(aScrollView.contentOffset.x, oldY)];
    // or if you are sure you wanna it always on top:
    // [aScrollView setContentOffset: CGPointMake(aScrollView.contentOffset.x, 0)];
}

it's just the method called when the user scroll your UIScrollView, and doing so you force the content of it to have always the same .y

回答4:

Include the following method

-(void)viewDidLayoutSubviews{
    self.automaticallyAdjustsScrollViewInsets = NO;
}

and set the content size width of the scroll view equal to the width of the scroll view.

回答5:

I updated the content size to disable vertical scrolling, and the ability to scroll still remained. Then I figured out that I needed to disable vertical bounce too, to disable completly the scroll.

Maybe there are people with this problem too.

回答6:

You need to pass 0 in content size to disable in which direction you want.

To disable vertical scrolling

scrollView.contentSize = CGSizeMake(scrollView.contentSize.width,0);

To disable horizontal scrolling

scrollView.contentSize = CGSizeMake(0,scrollView.contentSize.height);

回答7:

- (void)scrollViewDidScroll:(UIScrollView *)aScrollView
{
    [aScrollView setContentOffset: CGPointMake(aScrollView.contentOffset.x,0)];

}

you must have confirmed to UIScrollViewDelegate

aScrollView.delegate = self;

回答8:

On iOS 11 please remember to add the following, if you're interested in creating a scrollview that sticks to the screen bounds rather than a safe area.:

if (@available(iOS 11.0, *)) {
    [self.scrollView setContentInsetAdjustmentBehavior:UIScrollViewContentInsetAdjustmentNever];
}

回答9:

Just set the y to be always on top. Need to conform with UIScrollViewDelegate

func scrollViewDidScroll(scrollView: UIScrollView) {
        scrollView.contentOffset.y = 0.0
}

This will keep the Deceleration / Acceleration effect of the scrolling.