iOS 13 UIActivityViewController 在图像保存后自动呈现以前的 VC

Question

我正在尝试实现“将图像保存到库”功能，然后返回到当前 View Controller ，但在新的 iOS 13 上，它会返回到呈现当前 View Controller 的 View Controller :

PHPhotoLibrary.requestAuthorization({(_ status: PHAuthorizationStatus) -> Void in })

let shareItems: Array = [newImg,"Hello"] as [Any]

let activityController = UIActivityViewController(activityItems: shareItems, applicationActivities: nil)

if UIDevice.current.userInterfaceIdiom == .pad {
    activityController.popoverPresentationController?.sourceView = saveButton
}

present(activityController, animated: true)

Answer 1

@KDP 解决方案的 Swift 版本:

let fakeViewController = TransparentViewController()
fakeViewController.modalPresentationStyle = .overFullScreen

activityViewController.completionWithItemsHandler = { [weak fakeViewController] _, _, _, _ in
    if let presentingViewController = fakeViewController?.presentingViewController {
        presentingViewController.dismiss(animated: false, completion: nil)
    } else {
        fakeViewController?.dismiss(animated: false, completion: nil)
    }
}
present(fakeViewController, animated: true) { [weak fakeViewController] in
    fakeViewController?.present(activityViewController, animated: true, completion: nil)
}

fakeViewController 要么在事件完成时关闭，要么我们需要在完成时关闭它。