SwiftUI Share Sheet Crashes iPad

Question

I was following this tutorial https://jeevatamil.medium.com/how-to-create-share-sheet-uiactivityviewcontroller-in-swiftui-cef64b26f073

to add a simple share sheet to my swiftui app. It works properly on iPhones but crashes on iPad with this error

Terminating app due to uncaught exception 'NSGenericException', reason: 'UIPopoverPresentationController (<UIPopoverPresentationController: 0x107d95ee0>) should have a non-nil sourceView or barButtonItem set before the presentation occurs.'

Any way to get around this error? Not exactly sure what's happening here. Thanks!

Welcome to SO. Rather than posting links to code (which can go stale), it's generally a better idea to include a [mre] here in code. Taking a glance at that tutorial, you could try to set `sourceView` to the root view controller's view, for example, but you make find better luck using `UIViewControllerRepresentable` : https://stackoverflow.com/a/58341956/560942 — jnpdx, Apr 13 '21 at 16:26

score 2 · Answer 1 · answered Mar 23 '22 at 17:41

You just need to set sourceView and sourceRect on the UIActivityViewController's popoverPresentationController. Here's a more complete and correct example than I've seen so far:

// Get a scene that's showing (iPad can have many instances of the same app, some in the background)
let activeScene = UIApplication.shared.connectedScenes.first(where: { $0.activationState == .foregroundActive }) as? UIWindowScene
        
let rootViewController = (activeScene?.windows ?? []).first(where: { $0.isKeyWindow })?.rootViewController
        
// iPad stuff (fine to leave this in for all iOS devices, it will be effectively ignored when not needed)
activityVC.popoverPresentationController?.sourceView = rootViewController?.view
activityVC.popoverPresentationController?.sourceRect = .zero
        
rootViewController?.present(activityVC, animated: true, completion: nil)

score 0 · Answer 2 · answered Mar 11 '22 at 12:47

Try this code to open Actionsheet in iPad.

if let vc = UIApplication.shared.windows.first?.rootViewController{
        let activityVC = UIActivityViewController(activityItems: [urlShare], applicationActivities: nil)
        if isIpad{
            activityVC.popoverPresentationController?.sourceView = vc.view
            activityVC.popoverPresentationController?.sourceRect = .zero
        }
        UIApplication.shared.windows.first?.rootViewController?.present(activityVC, animated: true, completion: nil)
    }

SwiftUI Share Sheet Crashes iPad

2 Answers2

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