如何在第一个操作表Swift中单击按钮时显示第二个操作表

Question

我可以通过调用editPhotoActionSheet来显示showActionSheetToEditPhoto()。

当我点击editPhotoActionSheet中的删除按钮时，我想显示deletePhotoActionSheet，但我无法使用以下代码执行此操作。 请告知我如何实现这一目标。

另见下面的两个行动表。

func showActionSheetToEditPhoto()  -> UIAlertController {

    let alertController : UIAlertController = UIAlertController()
    let takePhoto : UIAlertAction = UIAlertAction(title: "Take Photo", style: .default) { (alert) in
        print("User pressed Take Photo")
        self.takePhoto()
    }
    let choosePhoto : UIAlertAction = UIAlertAction(title: "Choose Photo", style: .default) { (alert) in
        print("User pressed Choose Photo")
        self.choosePhoto()
    }
    let editPhoto : UIAlertAction = UIAlertAction(title: "Edit Photo", style: .default) { (alert) in
        print("User pressed Edit Photo")
        self.editExisitingProfilePhoto()
    }

     let deletePhoto : UIAlertAction = UIAlertAction(title: "Delete Photo", style: .default) { (alert) in
     print("User pressed Delete Photo")
     self.showDeletePhotoActionSheet()

     }

    let cancel : UIAlertAction = UIAlertAction(title: "Cancel", style: .cancel) { (alert) in
        print("User pressed Cancel")
    }

    alertController.addAction(takePhoto)
    alertController.addAction(choosePhoto)
    alertController.addAction(editPhoto)
    alertController.addAction(deletePhoto)
    alertController.addAction(cancel)
    alertController.popoverPresentationController?.sourceView = view
    alertController.popoverPresentationController?.sourceRect = view.frame

    return alertController
}

func showDeletePhotoActionSheet()  -> UIAlertController {
    print("showOptionsToDeletePhoto function called")
    self.dismiss(animated: true, completion: nil) // Dismissing previous alert

    let alertController : UIAlertController = UIAlertController()
    let deletePhoto : UIAlertAction = UIAlertAction(title: "Delete Photo", style: .default) { (alert) in
        print("User pressed delete Photo")
        var existingPhoto = self.profilePhoto.image
        if existingPhoto != nil{
            self.profilePhoto.image = nil
        }
    }

    let cancel : UIAlertAction = UIAlertAction(title: "Cancel", style: .cancel) { (alert) in
        print("User pressed Cancel")
    }

    alertController.addAction(deletePhoto)
    alertController.addAction(cancel)
    alertController.popoverPresentationController?.sourceView = view
    alertController.popoverPresentationController?.sourceRect = view.frame

    return alertController
}

EditPhotoActionSheet

DeletePhotoActionSheet

Answer 1

您的方法showDeletePhotoActionSheet返回UIAlertController个实例，但您尚未使用该对象来显示操作表。因此，请在deletePhoto操作中显示操作提醒。

let deletePhoto : UIAlertAction = UIAlertAction(title: "Delete Photo", style: .default) { (alert) in
     print("User pressed Delete Photo")
     let alert = self.showDeletePhotoActionSheet()
     //present delete the action sheet
     self.present(alert, animated: true) //Or self.present(self.showDeletePhotoActionSheet(), animated: true)
}