IOS 8 iPad App Crashes When UIActivityViewController Is Called

Question

When a UIActivityViewController is called on the iPhone in this app, it works perfectly, but when called on a iPad, the app crashes. Below is the code I used:

Answer 1

Before presenting the UIActivityViewController, add in this line of code:

activityViewController.popoverPresentationController?.sourceView = self.view

This way, the view controller knows in which frame of the GameViewController to appear in.

Answer 2

There are two option, the action came from a UIBarButtonitem or UIButton that is a UIView.

func shareButtonPress() {

    ...

    if let actv = activityViewController.popoverPresentationController {
        actv.barButtonItem = someBarButton // if it is a UIBarButtonItem

        // Or if it is a view you can get the view rect
        actv.sourceView = someView
        // actv.sourceRect = someView.frame // you can also specify the CGRect
    }

    self.presentViewController(activityViewController, animated: true, completion: nil)
}

You may have to add a sender to your function like func shareButtonPress(sender: UIBarButtonItem) or func shareButtonPress(sender: UIButton)

Answer 3

If you read the error it says how to fix it, you need to set the barButtonItem or sourceView from which to present the popover from, in your case:

func shareButtonPress(pressedButton: UIBarButtonItem) { 

    ...

    activityViewController.popoverPresentationController.barButtonItem = pressedButton

    self.presentViewController(activityViewController, animated: true, completion: nil)
}

Answer 4

Swift 5:

Check if the device is iPhone or iPad and based on that add a sourceView and present the activityController

let activity = UIActivityViewController(activityItems: [self], applicationActivities: nil)
if UIDevice.current.userInterfaceIdiom == .phone {
    UIApplication.topViewController?.present(activity, animated: true, completion: nil)
} else {
    activity.popoverPresentationController?.sourceView = UIApplication.topViewController!.view
    UIApplication.topViewController?.present(activity, animated: true, completion: nil)
}

Answer 5

I added for Swift 3:

activityViewController.popoverPresentationController?.sourceView = self.view

fixed my issue.