App get crashed while interacting with scrollview - PanModal.

[parasjoshicasting]

Hi,

Is anyone facing any crash issues with the method didPanOnScrollView of the class PanModalPresentationController?
Here are the crash logs with some lines where we can identify the reason.

UIKitCore 0x1c79a0 -[UIScrollView setContentOffset:animated:animationCurve:animationAdjustsForContentOffsetDelta:animation:animationConfigurator:] + 824
0x2574ec PanModalPresentationController.didPanOnScrollView(:change:) + 732 (PanModalPresentationController.swift:732)
0x257350 closure #1 in PanModalPresentationController.observe(scrollView:) + 4299109200 (:4299109200)

Kindly let me know if anyone facing the issue or has any idea about that.

Thank you

[Brandon-T]

Just got the same crash but I have a stack trace:

PanModalPresentationController calls didPanOnScrollView which calls haltScrolling which modifies contentOffset when it calls scrollView.setContentOffset(CGPoint(x: 0, y: scrollViewYOffset), animated: false) which then in turn, calls the observer which calls didPanOnScrollView.

TLDR: didPanOnScrollView -> haltScrolling -> scrollView.setContentOffset -> didPanOnScrollView -> haltScrolling -> scrollView.setContentOffset -> didPanOnScrollView -> .........

Infinite recursion -> stack overflow -> crash