UIActivityViewControllerCompletionHandler How to?

Question

I am trying to use the UIActivityViewControllerCompletionHandler , but i dont quite get how..

I want to detect when the user finishes or dismisses this

Answer 1

Swift 5:

func showShareOf(url: URL, title: String) {
    let shareItems: [Any] = ["\(title)\n", url]
    let activityVC = UIActivityViewController(activityItems: shareItems, applicationActivities: nil)
    activityVC.completionWithItemsHandler = doneSharingHandler
    self.present(activityVC, animated: true, completion: nil)
}

@objc func doneSharingHandler(activityType: UIActivity.ActivityType?, completed: Bool, _ returnedItems: [Any]?, error: Error?) {
    if (!completed) { return }
    // If here, log which activity occurred
    print("Shared activity: \(activityType)")
}