rxcode.swift

        // setup sharing button and UIActivityViewController
        // once the download finishes
        downloadingViewModel.fileDownloadCompleteEvent.asObservable()
            .observeOn(MainScheduler.instance)
            .subscribe({ download in
                self.fullDownloadButton.rx.tap
                    .bind {
                        // copy file to temp dir to rename it
                        if let localDownload = self.downloadingViewModel.fileDownload.value {
                            let activityViewController = UIActivityViewController(activityItems: [UIImage(named: "FWBCLogo")!, "Shared via the Faithful Word App: https://faithfulwordapp.com/", localDownload.localUrl], applicationActivities: nil)

                            activityViewController.excludedActivityTypes = [
                                .addToReadingList,
                                .openInIBooks,
                                .print,
                                .saveToCameraRoll,
                                .postToWeibo,
                                .postToFlickr,
                                .postToVimeo,
                                .postToTencentWeibo]

                            self.present(activityViewController, animated: true, completion: {})
                        }

                }
            })
            .disposed(by: bag)