问题
In iOS 12.2, passing true to PDFView's usePageViewController(_, withViewOptions:) will cause a crash with the following exception:
*** Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan nan]'
The same code works fine on iOS 12.1. I also have other projects that do this and those projects do work on iOS 12.2, but their view controller hierarchy is quite a bit more complicated.
Is there possibly something I'm missing, or should I file a bug report with Apple?
I have created a tiny project on github which demonstrates the crash at https://github.com/rudedogdhc/crash-pdfview-ios12.2
回答1:
Try moving usePageViewController(_, withViewOptions:) (and everything else you're setting up with it for that matter) into viewDidAppear instead of viewDidLoad
I ran into the same problem and found the answer here: There's problem with PDFKit appeared after update to Xcode 10.2. Is there any way to solve?
来源：https://stackoverflow.com/questions/55362761/crash-with-pdfkit-on-ios-12-2