如何在ios应用中显示Interstitial？

Question

每次我打开类别的间隙出现，我想让它出现一次

代码

//----------Interstitial Initialization-------------//
-(void)createAndLoadInterstitial
{
    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

    _interstitial = [[GADInterstitial alloc] initWithAdUnitID:appDelegate.InterstitialAdUnitID];
    _interstitial.delegate = self;
    [_interstitial loadRequest:[GADRequest request]];
}
- (void)interstitialDidReceiveAd:(GADInterstitial *)interstitial
{
    [_interstitial presentFromRootViewController:self];
}
- (void)interstitial:(GADInterstitial *)interstitial didFailToReceiveAdWithError:(GADRequestError *)error
{
    NSLog(@"interstitialDidFailToReceiveAdWithError: %@", [error localizedDescription]);
}
- (void)interstitialDidDismissScreen:(GADInterstitial *)interstitial
{
    NSLog(@"interstitialDidDismissScreen");
}

Answer 1

尝尝这个

static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
//call your method here
     [self createAndLoadInterstitial];
    });