AdMob-“Ad未就绪”错误,单位ID为真(Swift)

我的代码:

import UIKit
import GoogleMobileAds

class ViewController: UIViewController {
var interstitial: GADInterstitial!

override func viewDidLoad() {
   super.viewDidLoad()
   interstitial = createAndLoadInterstitial()
}

override func viewWillAppear(_ animated: Bool) {
   super.viewWillAppear(animated)
   DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
    if self.interstitial.isReady {
        self.interstitial.present(fromRootViewController: self)
    } else {
        print("Ad wasn't ready")
    }
   }
}

func createAndLoadInterstitial() -> GADInterstitial {
    let interstitial = GADInterstitial(adUnitID: "AdMob Real Unit ID")
    interstitial.delegate = self
    let request = GADRequest()
    GADMobileAds.sharedInstance().requestConfiguration.testDeviceIdentifiers = ["my device ID from console"]
    interstitial.load(request)
    return interstitial
}
}

extension ViewController: GADInterstitialDelegate {
func interstitialDidDismissScreen(_ ad: GADInterstitial) {
    interstitial = createAndLoadInterstitial()
}
}

慰问: