Showing interstitial ad on every x loads of viewdidload - ios

Question

I am trying to figure out, to show an interstitial ad on every x loads of viewdidload calls.
I am loading that ad, when my viewdidload calls. But I want to load it, when the viewdidload called x time.
Any help will be appreciated. Here is my code;
class DetailController: UIViewController, GADInterstitialDelegate {
//Admob
...
...
var fullScreenAds : GADInterstitial!
//Interstitial-Ad
func createAndLoadInterstitial() -> GADInterstitial? {
fullScreenAds = GADInterstitial(adUnitID: myInterstitialID)
guard let fullScreenAds = fullScreenAds else {
return nil
}
let request = GADRequest()
request.testDevices = [ kGADSimulatorID ]
fullScreenAds.load(request)
fullScreenAds.delegate = self
return fullScreenAds
}
func interstitialDidReceiveAd(_ ad: GADInterstitial) {
print("Ads loaded.")
ad.present(fromRootViewController: self)
}
func interstitialDidFail(toPresentScreen ad: GADInterstitial) {
print("Ads not loaded.")
}
//MARK: View functions
override func viewDidLoad() {
super.viewDidLoad()
......
SVProgressHUD.show()
imageView.af_setImage(withURL: URL(string: pic.largeImageURL!)!, placeholderImage: imgPlaceHolder, filter: nil, progress: nil, progressQueue: DispatchQueue.main, imageTransition: .crossDissolve(0.2), runImageTransitionIfCached: true) { (data) in
SVProgressHUD.dismiss()
}
scrollView.delegate = self
setupScrollView()
setupGestureRecognizers()
setupBanner()
self.fullScreenAds = createAndLoadInterstitial()
}
}

Answer 1

You could use UserDefaults to store a count each time the view is loaded. Once it reaches it's limit, reset the count and show the ad.
Example code:
class ViewController: UIViewController {
private let adFrequency = 5
private let userDefaults: UserDefaults = .standard
private let defaultsKey = "passwordScreenViewCount"
override func viewDidLoad() {
super.viewDidLoad()
let count = userDefaults.integer(forKey: defaultsKey)
if count + 1 >= adFrequency {
userDefaults.set(0, forKey: defaultsKey)
// show the ad
} else {
userDefaults.set(count + 1, forKey: defaultsKey)
}
}
}

Answer 2

Take 1 global variable viewDidLoadCount and set to 0.
Suppose you want to show ad every 5 viewDidLoad(). So,
Increment viewDidLoadCount by 1 in every viewDidLoad() method and check
//take global variable
var viewDidLoadCount : Int = 0
override func viewDidLoad() {
super.viewDidLoad()
viewDidLoadCount+=1
if viewDidLoadCount == 5 {
//send post notification to your main viewcontroller in which you have done code of ad delegate.
}
}