medium-peekandpoppost-2.swift

class TweetViewController: UIViewController {
    var initiatingPreviewActionController: UIViewController?
    override func previewActionItems() -> [UIPreviewActionItem] {
        guard let initiatingPreviewActionController = initiatingPreviewActionController else {
            assert(false, "Expected initiatingPreviewActionController to be set")
            return []
        }
        return [UIPreviewAction(title: "Share", style: .Default,
            handler: {[unowned self] (_, _) -> Void in
                let shareSheet = self.createShareSheet()
                shareSheet.popoverPresentationController?.sourceView = self.view
                initiatingPreviewActionController.presentViewController(shareSheet, animated: true, completion: nil)
            }),
            UIPreviewAction(title: "Favorite", style: .Default,
                handler: {[unowned self] (_, _) -> Void in
                    self.favoriteTweet()
                })]
    }
    
    func createShareSheet() -> UIViewController {
        return UIActivityViewController(activityItems: ["www.twitter.com/tweeturl"], applicationActivities: nil)
    }
    
    func favoriteTweet() {
     //favorites a tweet
    }
}