每次呈现视图控制器时呈现插页式广告 - Swift 4

Question

我只是希望每次出现某个视图控制器时都会出现一个插页式广告。这是相关代码（不是全部）...

//import ads, set delegate, and declare variable...
import UIKit
import GoogleMobileAds

class myVC: UIViewController, GADInterstitialDelegate {

var interstitial: GADInterstitial!

准备好广告并在呈现视图控制器时呈现它...

override func viewDidLoad() {
    super.viewDidLoad()

    interstitial = GADInterstitial(adUnitID: "ca-app-pub-3940256099942544/4411468910")
    let request = GADRequest()
    interstitial.load(request)
}


override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    if (interstitial.isReady) {
        interstitial.present(fromRootViewController: self)
        interstitial = createAd()
    }
}

确保广告可以准备好下次...

func createAd() -> GADInterstitial {

    let inter = GADInterstitial(adUnitID: "ca-app-pub-3940256099942544/4411468910")

    inter.load(GADRequest())
    return inter
}

那么为什么这不起作用？我可以通过按一个按钮来显示广告（我显然稍微改变了代码来做到这一点），但我希望广告简单地出现在视图控制器上的演示文稿中。我错过了什么？

Answer 1

我注意到interstitial ad 的问题是在调用viewWillAppear 或viewDidAppear 时它还没有准备好。因此，对interstitial.isReady 的检查失败。 GADInterstitialDelegate 方法调用了interstitialDidReceiveAd，它会告诉您添加何时准备就绪。然后，您需要围绕监视广告何时准备好以及是否已经向用户展示广告来构建一些逻辑。

import UIKit
import GoogleMobileAds

class AdViewController:UIViewController, GADInterstitialDelegate {

    var interstitial: GADInterstitial!

    private var shouldDisplayAd = true

    private var isAdReady:Bool = false {
        didSet {
            if isAdReady && shouldDisplayAd {
                displayAd()
            }
        }
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        print(#function)
        interstitial = GADInterstitial(adUnitID: "/6499/example/interstitial")
        interstitial.delegate = self
        let request = GADRequest()
        interstitial.load(request)
        print(#function, "shouldDisplayAd", self.shouldDisplayAd, "isAdReady", self.isAdReady)
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        print(#function, "shouldDisplayAd", self.shouldDisplayAd, "isAdReady", self.isAdReady)
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        print(#function, "shouldDisplayAd", self.shouldDisplayAd, "isAdReady", self.isAdReady)
    }

    @IBAction func adButton(_ sender: UIButton) {
        print(#function, "shouldDisplayAd", self.shouldDisplayAd, "isAdReady", self.isAdReady)
        displayAd()
    }

    private func displayAd() {
        print(#function, "ad ready", interstitial.isReady)
        if (interstitial.isReady) {
            shouldDisplayAd = false
            interstitial.present(fromRootViewController: self)
        }
    }

    private func presentViewController() {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let myVC = storyboard.instantiateViewController(withIdentifier: "buttonViewController")
        self.present(myVC, animated: true) { [unowned self] in
            self.shouldDisplayAd = true
            print(#function, "shouldDisplayAd", self.shouldDisplayAd, "isAdReady", self.isAdReady)
        }
    }

    func createAndLoadInterstitial() -> GADInterstitial {
        interstitial = GADInterstitial(adUnitID: "/6499/example/interstitial")
        interstitial.delegate = self
        interstitial.load(GADRequest())
        shouldDisplayAd = false
        return interstitial
    }

    /// Tells the delegate an ad request failed.
    func interstitialDidFail(toPresentScreen ad: GADInterstitial) {
        print(#function, "ad ready", interstitial.isReady)
    }

    func interstitialDidReceiveAd(_ ad: GADInterstitial) {
        print(#function, "ad ready", interstitial.isReady)
        isAdReady = true
    }

    //Tells the delegate the interstitial is to be animated off the screen.
    func interstitialWillDismissScreen(_ ad: GADInterstitial) {
        print("interstitialWillDismissScreen")
    }

    //Tells the delegate the interstitial had been animated off the screen.
    func interstitialDidDismissScreen(_ ad: GADInterstitial) {
        print("interstitialDidDismissScreen")
        presentViewController()
        interstitial = createAndLoadInterstitial()
        print(#function, "shouldDisplayAd", shouldDisplayAd, "isAdReady", isAdReady)
    }
}