ios - 关闭完成区块不起作用。 swift

我已将PhotoBrowser（它继承自UIViewController）作为presentedViewController。我从UITableViewController中呈现它。当我点击按钮时，PhotoBrowser显示actionMainController（它继承自UIAlertController）。我想调用另一个UIAlertController，当我在actionMainController中选择一个操作并在其解除但完成块不起作用后立即显示第二个UIAlertController。我想补充一点，关闭actionMainController成功

class PhotoBrowser: SKPhotoBrowser {

    // MARK: - Controllers

    private var actionMainController = UIAlertController()

    // MARK: - Lifecycle

    override func viewDidLoad() {
        super.viewDidLoad()
    }


    // MARK: - override var

    override var prefersStatusBarHidden: Bool {
        return true
    }

    // MARK: - functions

    func editAvatar() {
        debugPrint("removePhoto")

        actionMainController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)

        actionMainController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

        let deleteAction = UIAlertAction(title: "Delete Photo", style: .destructive) { (action) in
            self.deletePhoto()
        }
        let takePhoto = UIAlertAction(title: "Take Photo", style: .default) { (action) in

        }
        let choosePhoto = UIAlertAction(title: "Choose Photo", style: .default) { (action) in

        }
        actionMainController.addAction(deleteAction)
        actionMainController.addAction(takePhoto)
        actionMainController.addAction(choosePhoto)

        present(actionMainController, animated: true, completion: nil)
    }

    private func deletePhoto() {
        actionMainController.dismiss(animated: true) {
            // TODO: it
//            self.showDeleteActionSheet()
        }
        showDeleteActionSheet()
    }

    private func showDeleteActionSheet() {
        let deleteActionController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
        deleteActionController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
        let deleteAction = UIAlertAction(title: "Delete Photo", style: .destructive) { (action) in

        }
        deleteActionController.addAction(deleteAction)

        present(deleteActionController, animated: true, completion: nil)
    }
}

最佳答案

未调用完成处理程序，因为警报已被解除，您正再次尝试解除警报。

actionMainController.dismiss(animated: true) {

     self.showDeleteActionSheet()
}

相反，您应该像

let deleteAction = UIAlertAction(title: "Delete Photo", style: .destructive) { (action) in

    self.showDeleteActionSheet()
 }