swift - 每次呈现 View Controller 时呈现插页式广告 - Swift 4

Question

我只是希望每次出现某个 View Controller 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 View Controller 出现时展示它......

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()
    }
}

确保下次广告准备就绪......

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呢？我可以通过按下按钮来显示广告(显然我稍微修改了代码来做到这一点)，但我希望广告只是与 View Controller 上的演示文稿一起显示。我错过了什么？

Answer 1

我注意到插页式广告的问题是，当调用viewWillAppear或viewDidAppear时它尚未准备好。因此，对 interstitial.isReady 的检查失败。 GADInterstitialDelegate 方法已调用 interstitialDidReceiveAd，它将告诉您添加何时准备就绪。然后，您需要围绕监控广告何时准备好以及是否已经向用户展示广告建立一些逻辑。

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)
    }
}