'How can I disable horizontal scrolling for an NSScrollView?

I first tried disabled the scroll bar by setting:

scrollView!.hasHorizontalScroller = false

and that successfully worked, but I could still scroll from left to right by using my trackpad. Is there a way to ensure that horizontal scrolling is completely disabled for an NSScrollView object?

Solution 1:^[1]

Even with a correct content size, I was still able to use two-finger gestures to scroll horizontally a bit before it snaps back into place. To fix this, you can set the elasticity:

scrollView.horizontalScrollElasticity = .None

Solution 2:^[2]

In addition to @mikepj's answer I also needed to do the following. Modifying this to become:

override func scrollWheel(with event: NSEvent) {
    super.scrollWheel(with: event)
    
    if event.deltaX != 0 {
        super.nextResponder?.scrollWheel(with: event)
    }
}

This may be because I was using an NSRulerView.

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	mikepj
Solution 2

'How can I disable horizontal scrolling for an NSScrollView?

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]