Cocos2d-x 2.2  

GoogleAdMobAdsSdkiOS-6.5.1

本人直接在AppController中加入代码，建议重新封装一个object-c的类，但是实现方式是一样的。

首先要导入GADInterstitila.h头文件，实现GADInterstitialDelegate委托，并定义一个GADInterstitila属性。showInterstitial方法供外部调用用来显示广告。

#import <UIKit/UIKit.h>
#import "GADInterstitial.h"

@class RootViewController;

@interface AppController : NSObject <UIApplicationDelegate,GADInterstitialDelegate> {
    UIWindow *window;
    RootViewController    *viewController;
    GADInterstitial *interstitial_;
}
@property(nonatomic, retain) GADInterstitial *interstitial;

- (void)showInterstitial;
@end

#pragma mark -
#pragma Interstitial Delegate
- (void)interstitial:(GADInterstitial *)interstitial
didFailToReceiveAdWithError:(GADRequestError *)error {

    
}

- (void)interstitialDidReceiveAd:(GADInterstitial *)interstitial {
    
}

- (void)interstitialDidDismissScreen:(GADInterstitial *)ad
{
    [self preloadRequest];
}

- (void)showInterstitial{
    if (self.interstitial.isReady) {
        CCLOG("ready");
        [self.interstitial presentFromRootViewController:viewController];
    }
   else
   {
       CCLOG("not ready");
       [self preloadRequest];
   }
}
#pragma mark GADRequest generation
-(void)initInterstitial
{
    // Create a new GADInterstitial each time.  A GADInterstitial
    // will only show one request in its lifetime. The property will release the
    // old one and set the new one.
    self.interstitial = [[[GADInterstitial alloc] init] autorelease];
    self.interstitial.delegate = self;
    
    // Note: Edit InterstitialExampleAppDelegate.m to update
    // INTERSTITIAL_AD_UNIT_ID with your interstitial ad unit id.
    self.interstitial.adUnitID = INTERSTITIAL_AD_UNIT_ID;
}
-(void)preloadRequest
{
    CCLOG("pre load");
     [self initInterstitial];
     [self.interstitial loadRequest: [self createRequest]];
}
// Here we‘re creating a simple GADRequest and whitelisting the application
// for test ads. You should request test ads during development to avoid
// generating invalid impressions and clicks.
- (GADRequest *)createRequest {
    GADRequest *request = [GADRequest request];
    
    // Make the request for a test ad. Put in an identifier for the simulator as
    // well as any devices you want to receive test ads.
    request.testDevices =
    [NSArray arrayWithObjects:
     // TODO: Add your device/simulator test identifiers here. They are
     // printed to the console when the app is launched.
     nil];
    return request;
}

跟android不同的是，interstitial对象每次request时都必须重新初始化。

完整的.m文件：

#import "AppController.h"
#import "EAGLView.h"
#import "cocos2d.h"
#import "AppDelegate.h"
#import "RootViewController.h"

#define INTERSTITIAL_AD_UNIT_ID @"YOUR_OWN_ID"

@implementation AppController

@synthesize interstitial = interstitial_;
#pragma mark -
#pragma mark Application lifecycle

// cocos2d application instance
static AppDelegate s_sharedApplication;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
    
    // Override point for customization after application launch.

    // Add the view controller‘s view to the window and display.
    window = [[UIWindow alloc] initWithFrame: [[UIScreen mainScreen] bounds]];
    
    // Init the EAGLView
    EAGLView *__glView = [EAGLView viewWithFrame: [window bounds]
                                     pixelFormat: kEAGLColorFormatRGB565
                                     depthFormat: GL_DEPTH24_STENCIL8_OES
                              preserveBackbuffer: NO
                                      sharegroup: nil
                                   multiSampling: NO
                                 numberOfSamples: 0];

    // Use RootViewController manage EAGLView 
    viewController = [[RootViewController alloc] initWithNibName:nil bundle:nil];
    viewController.wantsFullScreenLayout = YES;
    viewController.view = __glView;

    // Set RootViewController to window
    if ( [[UIDevice currentDevice].systemVersion floatValue] < 6.0)
    {
        // warning: addSubView doesn‘t work on iOS6
        [window addSubview: viewController.view];
    }
    else
    {
        // use this method on ios6
        [window setRootViewController:viewController];
    }
    
    [window makeKeyAndVisible];
    
    [[UIApplication sharedApplication] setStatusBarHidden:true];
//    [self initInterstitial];//每次request都要重新初始化
    [self preloadRequest];
    cocos2d::CCApplication::sharedApplication()->run();

    return YES;
}


- (void)applicationWillResignActive:(UIApplication *)application {
    /*
     Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
     Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
     */
    cocos2d::CCDirector::sharedDirector()->pause();
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
    /*
     Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
     */
    cocos2d::CCDirector::sharedDirector()->resume();
}

- (void)applicationDidEnterBackground:(UIApplication *)application {
    /*
     Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
     If your application supports background execution, called instead of applicationWillTerminate: when the user quits.
     */
    cocos2d::CCApplication::sharedApplication()->applicationDidEnterBackground();
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
    /*
     Called as part of  transition from the background to the inactive state: here you can undo many of the changes made on entering the background.
     */
    cocos2d::CCApplication::sharedApplication()->applicationWillEnterForeground();
}

- (void)applicationWillTerminate:(UIApplication *)application {
    /*
     Called when the application is about to terminate.
     See also applicationDidEnterBackground:.
     */
}


#pragma mark -
#pragma mark Memory management

- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
    /*
     Free up as much memory as possible by purging cached data objects that can be recreated (or reloaded from disk) later.
     */
}


- (void)dealloc {
    interstitial_.delegate = nil;
    [interstitial_ release];
    [window release];
    [super dealloc];
}

#pragma mark -
#pragma Interstitial Delegate
- (void)interstitial:(GADInterstitial *)interstitial
didFailToReceiveAdWithError:(GADRequestError *)error {

    
}

- (void)interstitialDidReceiveAd:(GADInterstitial *)interstitial {
    
}

- (void)interstitialDidDismissScreen:(GADInterstitial *)ad
{
    [self preloadRequest];
}

- (void)showInterstitial{
    if (self.interstitial.isReady) {
        CCLOG("ready");
        [self.interstitial presentFromRootViewController:viewController];
    }
   else
   {
       CCLOG("not ready");
       [self preloadRequest];
   }
}
#pragma mark GADRequest generation
-(void)initInterstitial
{
    // Create a new GADInterstitial each time.  A GADInterstitial
    // will only show one request in its lifetime. The property will release the
    // old one and set the new one.
    self.interstitial = [[[GADInterstitial alloc] init] autorelease];
    self.interstitial.delegate = self;
    
    // Note: Edit InterstitialExampleAppDelegate.m to update
    // INTERSTITIAL_AD_UNIT_ID with your interstitial ad unit id.
    self.interstitial.adUnitID = INTERSTITIAL_AD_UNIT_ID;
}
-(void)preloadRequest
{
    CCLOG("pre load");
     [self initInterstitial];
     [self.interstitial loadRequest: [self createRequest]];
}
// Here we‘re creating a simple GADRequest and whitelisting the application
// for test ads. You should request test ads during development to avoid
// generating invalid impressions and clicks.
- (GADRequest *)createRequest {
    GADRequest *request = [GADRequest request];
    
    // Make the request for a test ad. Put in an identifier for the simulator as
    // well as any devices you want to receive test ads.
    request.testDevices =
    [NSArray arrayWithObjects:
     // TODO: Add your device/simulator test identifiers here. They are
     // printed to the console when the app is launched.
     nil];
    return request;
}
@end

4、调用

#elif(CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    [(AppController*)[UIApplication sharedApplication].delegate showInterstitial];
#endif