Snippet to add to main.m in kivy-ios project

AdMob Interstitial Ads class for Kivy-ios

UIView *gView;
UIViewController *gViewColtroller;

@interface adInterstitial : NSObject
/// The interstitial ad.
@property(nonatomic, strong) GADInterstitial *interstitial;
@property (strong, nonatomic) GADRequest *request;
@end

@implementation adInterstitial

-(id)init {
    [self createAndLoadInterstitial];
    NSLog(@"adInterstitial init");
    return self;
}

- (void)createAndLoadInterstitial {
    self.interstitial = [[GADInterstitial alloc] initWithAdUnitID:@"ca-app-pub-3940256099942544/4411468910"]; // test id
    UIWindow *window = [UIApplication sharedApplication].keyWindow;
    UIViewController *rootViewController = window.rootViewController;
    self.interstitial.delegate = self;

    GADRequest *request = [GADRequest request];
    request.testDevices = @[ kGADSimulatorID, @"2077ef9a63d2b398840261c8221a0c9a" ];
    [self.interstitial loadRequest:request];
    NSLog(@"createAndLoadInterstitial");
}

- (void)interstitialWillDismissScreen:(GADInterstitial *)ad { 
    //  Method for reloading the object so that you can show ads again 
    NSLog(@"interstitialWillDismissScreen");
    [self createAndLoadInterstitial];
}

- (void)InterstitialView {  // show interstitial ADS
    if (self.interstitial.isReady) {
        NSLog(@"Show interstitial ADS!");
        UIWindow *window = [UIApplication sharedApplication].keyWindow;
        UIViewController *rootViewController = window.rootViewController;
        [self.interstitial presentFromRootViewController:rootViewController];
    } else {
        NSLog(@"interstitial Ad wasn't ready");
    }
}
@end