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

AdMob banner class for Kivy-ios

UIView *gView;
UIViewController *gViewColtroller;


@interface myBanner : NSObject <GADBannerViewDelegate>
@property (nonatomic) BOOL show_ads;
@property (strong, nonatomic) GADBannerView *gbanner;
@property (strong, nonatomic) GADRequest *request;
@end

static myBanner *vbanner = nil;

@implementation myBanner

-(id)init {
    // admob allocation
    NSLog(@"Creating google banner object");
    self.request = [GADRequest request];
    // I'm not sure this is even necessary
    self.request.testDevices = @[@"Simulator"];
    //SDLUIKitDelegate *sdldelegate = [SDLUIKitDelegate sharedAppDelegate];
    UIWindow *window = [UIApplication sharedApplication].keyWindow;
    UIViewController *rootViewController = window.rootViewController;
    
    gViewColtroller = rootViewController;//[[SDLLaunchScreenController alloc] init];
    gView = rootViewController.view; ///gViewColtroller.view;
    
    
    // Create a view of the standard size at the top of the screen.
    // Available AdSize constants are explained in GADAdSize.h.
    self.gbanner = [[GADBannerView alloc] initWithAdSize:kGADAdSizeBanner];

    [self.gbanner setDelegate:self];
    
    // Specify the ad's "unit identifier." The default ID is for Google’s test banner ad. If everything works and you see a google test ad, you have implemented everything correctly.
    self.gbanner.adUnitID = @"ca-app-pub-3940256099942544/6300978111"; // google's test id for banner ads


    
    //  ------------- Height and position of the banner ad
    //CGRect screenBounds = [[UIScreen mainScreen] bounds];
    //[self.gbanner setFrame:CGRectMake(0, 0, screenBounds.size.width, 1.5*self.gbanner.bounds.size.height)];
    //self.gbanner.center = CGPointMake(screenBounds.size.width / 2, screenBounds.size.height - (self.gbanner.bounds.size.height / 2));
    
    self.gbanner.hidden = TRUE;
    // Let the runtime know which UIViewController to restore after taking
    // the user wherever the ad goes and add it to the view hierarchy.
    self.gbanner.rootViewController = gViewColtroller;
    [gView addSubview:self.gbanner];
    
    [self.gbanner loadRequest:self.request];
    
    self.show_ads = TRUE;
    
    return self;
}

// Called before ad is shown, good time to show the add
- (void)adViewDidReceiveAd:(GADBannerView *)view
{
    NSLog(@"Admob load");
    self.gbanner.hidden = !self.show_ads;
}

// An error occurred
- (void)adView:(GADBannerView *)view didFailToReceiveAdWithError:(GADRequestError *)error
{
    NSLog(@"Admob error: %@", error);
    self.gbanner.hidden = TRUE;
}


-(void)dealloc {
    NSLog(@"Freeing ads");
    if (self.gbanner) {
        
        [self.gbanner removeFromSuperview];
        
        [self.gbanner release];
        self.gbanner.delegate = nil;
        self.gbanner = nil;
    }
    
    [super dealloc];
}


- (void)showAds:(int)ontop {
    self.show_ads = TRUE;
    
    NSLog(@"Displaying banner object ontop:%d.", ontop);
    
    CGSize AdSize = kGADAdSizeBanner.size;
    
    
    CGRect frame = self.gbanner.frame;
    frame.origin.x = (gViewColtroller.view.bounds.size.width - AdSize.width) / 2 ;
    
    if (ontop)
        frame.origin.y = 0.0f;
    else
        frame.origin.y = gViewColtroller.view.bounds.size.height - AdSize.height;
    
    self.gbanner.frame = frame;
    
}
@end


@interface adSwitch : NSObject
@end
@implementation adSwitch

-(id)init {
    if (!vbanner)
    {
        vbanner = [[myBanner alloc] init];
        
        [vbanner showAds:0];
    }
    return self;
}

-(void) show_ads {
    if (!vbanner)
        vbanner = [[myBanner alloc] init];
    
    [vbanner showAds:0];
}

-(void) hide_ads {
    if (vbanner)
    {
        
        
        [vbanner release];
        vbanner = nil;
    }
}
@end

Dear Erik, It is a beautiful guideline. However, the Xcode has been changed a lot. The code that you have used in the video gives error in the first line. And Xcode Build Settings are different. Everything is for swift but not For Kivy. Please see this link; https://developers.google.com/admob/ios/quick-start#swift

could you tell me about the differences ? Because all I got is framework errors.

I've made it runnable by fork this snippet.

Bottom, Top - change line 99-102
if (ontop)
frame.origin.y = gViewColtroller.view.bounds.size.height - AdSize.height;
else
frame.origin.y = 0.0f;