How do I call a fromRootViewController method within a UIView class? - swift

Question

EDIT: This is a very beginner level question, so I apologise in advance
This is a sub part of a homework assignment I'm trying to crack but seems kind of impossible. I have implemented GADRewardBasedVideoAdDelegate to my UIView for Rewarded ads on Google Admob, and managed to implement all other instances of this delegate within "PopUp", which is a subclass of UIView.
However, this one method seems impossible to implement, which is:
if GADRewardBasedVideoAd.sharedInstance().isReady == true {
GADRewardBasedVideoAd.sharedInstance().present(fromRootViewController: self)
}
where the issue is the ".present(fromRootViewController: self) portion of the code since the self refers not to a ViewController but to a UIView().
I honestly don't know how to tackle this situation, so I do not have anything to show for my attempts at this issue. I would really be grateful for any guidance that I can get on this topic, I've been stuck here for the better part of 2 days.
Here is the popUp class in case it helps make my code clearer
import UIKit
import GoogleMobileAds
class Popup: UIView, GADRewardBasedVideoAdDelegate {
func rewardBasedVideoAd(_ rewardBasedVideoAd: GADRewardBasedVideoAd, didRewardUserWith reward: GADAdReward) {
let vc = MainVC()
vc.lifeNumber += 3
vc.numberOfLivesLabel.text = "\(vc.lifeNumber)"
}
func rewardBasedVideoAdDidClose(_ rewardBasedVideoAd: GADRewardBasedVideoAd) {
GADRewardBasedVideoAd.sharedInstance().load(GADRequest(), withAdUnitID: "ca-app-pub-3940256099942544/1712485313")
}
let playButton: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setImage(UIImage(named: "icon"), for: .normal)
button.addTarget(self, action: #selector(play), for: .touchUpInside)
return button
}()
#objc func play() {
print("Play button pressed.")
if GADRewardBasedVideoAd.sharedInstance().isReady == true {
GADRewardBasedVideoAd.sharedInstance().present(fromRootViewController: self) //<---------ERRONEOUS CODE
}
}
override init(frame: CGRect) {
super.init(frame: frame)
GADRewardBasedVideoAd.sharedInstance().load(GADRequest(), withAdUnitID: "ca-app-pub-3940256099942544/1712485313")
GADRewardBasedVideoAd.sharedInstance().delegate = self
self.addSubview(popUpContainer)
playButton.centerXAnchor.constraint(equalTo: popUpContainer.centerXAnchor),
playButton.topAnchor.constraint(equalTo: popUpContainer.topAnchor, constant: 15),
playButton.heightAnchor.constraint(equalToConstant: 300)
playButton.widthAnchor.constraint(equalToConstant: 300)
}
required init?(coder aDecoder: NSCoder) {
fatalError("Could not run init(coder)")
}
}
And here is my MainVC()
class MainVC: UIViewController {
var lifeNumber: Int = 3
lazy var numberOfLivesLabel: UILabel = {
let label = UILabel()
label.text = "\(lifeNumber)"
label.font = UIFont(name: "Copperplate", size: 25)
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
let buttonOne: UIButton = {
let button = UIButton(type: .system)
button.setTitle("Hit me!", for: .normal)
button.addTarget(self, action: #selector(buttonPressed), for: .touchUpInside)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
#objc func buttonPressed() {
let popUpView = Popup()
self.view.addSubview(popUpView)
}
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .systemBlue
view.addSubview(buttonOne)
view.addSubview(numberOfLivesLabel)
buttonOne.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
buttonOne.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
buttonOne.heightAnchor.constraint(equalToConstant: 300).isActive = true
buttonOne.widthAnchor.constraint(equalToConstant: 300).isActive = true
numberOfLivesLabel.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
numberOfLivesLabel.bottomAnchor.constraint(equalTo: buttonOne.topAnchor, constant: 50).isActive = true
}
}

Answer 1

This code from hacking with swift will help.
extension UIView {
func findViewController() -> UIViewController? {
if let nextResponder = self.next as? UIViewController {
return nextResponder
} else if let nextResponder = self.next as? UIView {
return nextResponder.findViewController()
} else {
return nil
}
}
}
Use the extension to get the popups parent view controller.
if GADRewardBasedVideoAd.sharedInstance().isReady == true {
GADRewardBasedVideoAd.sharedInstance().present(fromRootViewController: self.findViewController())
}
You might want to put it on the main queue as well
if GADRewardBasedVideoAd.sharedInstance().isReady == true {
DispatchQueue.main.async {
GADRewardBasedVideoAd.sharedInstance().present(fromRootViewController: self.findViewController())
}
}