How should we show following ViewController? - ios

Question

I am facing a interrogation, and I hope you could help me to find an answer.
I am selecting X items in a row.
I have already made a custom alert for 1 item selection in a row that look like this.
Here is how I call the alert
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let myAlert = storyboard.instantiateViewController(withIdentifier: "uploadAlert") as! AlertUploadViewController
myAlert.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext
myAlert.modalTransitionStyle = UIModalTransitionStyle.crossDissolve
let image = self.interventionsSelected[0].picture
myAlert.initAlert(image: image!)
request.view.present(myAlert, animated: true, completion: nil)
As you can see, I'm only taking the first image selected. Now, I want to take ALL selected images.
My problematic here is that I want to link all alerts and make smooth transition between them. How can I link the dismissing of an alert and the presenting of the next one ?
Should I make a array of all alerts and catch the dismissing ?
Should I have to use closure and linking all closure ?
I am not sure how I can do that in the best possible smooth way.

Answer 1

you need to maintain a delegate method for the alertcontroller of yours
make a Protocol as
protocol AlertProtocol: class {
func showNextAlert()
}
now assign your main view controller as its delegate
in your alertviewcotntroller:
var delegate: AlertProtocol?
and as you click button in alert controller to do something and close the alert , in its completion handler
self.dismiss(animated: true) {
self.delegate.showNextAlert()
}
this was your current alert closes, and a window heirarcy is maintained and another alert is opened with new data in flow

Answer 2

I would not go with multiple alerts at the same time because it seems visually what will happen is your darker background will be even darker with more alerts. And when dismissing each of them you will have the background brighter...
Supporting multiple images internally seems quite good but it is maybe not scalable if you later choose that some of these internal views will be completely different (one for images the other for whatever you can think of).
The best scenario I can think of is creating this overlay view controller with a container view. So this view is capable of showing view controllers and is able to animate them internally. The interface from how you then use it would look something like:
let container = MyContainerViewController.instantiateFromStoryboard()
container.injectViewControllers([
ShowImageViewController.instantiateFromStoryboard(image: image[0], delegate: self),
ShowImageViewController.instantiateFromStoryboard(image: image[1], delegate: self),
ShowSomethingElseViewController.instantiateFromStoryboard(data: data[0], delegate: self)
])
present(container...
So then I guess you would have a delegate method such as
func embeddedController(_ sender: UIViewController, shouldProceedWithData outputData: Any?) {
if container.canGoForward() {
container.forward(animated: true)
} else {
container.dismiss(...
}
}