C++ 如何在游戏中显示和隐藏广告横幅？

要导入横幅，我有以下内容

#import "RootViewController.h"
#import "cocos2d.h"
#import "platform/ios/CCEAGLView-ios.h"
#import <iAd/iAd.h>

@interface RootViewController()

@end


@implementation RootViewController

---

问题是在我的游戏中，整个游戏中都会出现广告，我只想在gameover.cpp初始化后出现横幅。我该怎么做？GAMEOFF类是C++，RooVIEW控制器在OBJ C.< /P> < P >尝试这个代码显示和隐藏广告横幅：

- (void)showiAdBanner
 {
    if( !_adView ) { // only add to view if it's not already there
        _adView = [[ADBannerView alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height - 50, 320, 50)]; //initialize it
        _adView.delegate = self; // set delegate
    }
    _adView.hidden = NO; //reveal it
    _bannerIsVisible = YES; //set bool to yes
}

- (void)hideiAdBanner {
   _adView.hidden = YES; //hide it
   _bannerIsVisible = NO; // set bool to no
}

无论在何处显示和隐藏，都可以调用这两个方法

- (void)showiAdBanner
 {
    if( !_adView ) { // only add to view if it's not already there
        _adView = [[ADBannerView alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height - 50, 320, 50)]; //initialize it
        _adView.delegate = self; // set delegate
    }
    _adView.hidden = NO; //reveal it
    _bannerIsVisible = YES; //set bool to yes
}

- (void)hideiAdBanner {
   _adView.hidden = YES; //hide it
   _bannerIsVisible = NO; // set bool to no
}