IOS How to integration iAd

iAd is used for display ads served by the apple server and helps us in earning revenue from the application.
1. Create a simple View based application.
2. Select your project file, then select targets and then add iAd.framework in choose frameworks.
3. Update ViewController.h as follows.

#import <UIKit/UIKit.h>
#import <iAd/iAd.h>
@interface ViewController : UIViewController<ADBannerViewDelegate>
{
    ADBannerView *bannerView;
}
@end

4.Update ViewController.m as follows. 

#import "ViewController.h"

@interface ViewController ()

@end
4.Update ViewController.m as follows.
@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    bannerView = [[ADBannerView alloc]initWithFrame:
    CGRectMake(0, 0, 320, 50)];
    // Optional to set background color to clear color
    [bannerView setBackgroundColor:[UIColor clearColor]];
    [self.view addSubview: bannerView];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - AdViewDelegates

-(void)bannerView:(ADBannerView *)banner 
 didFailToReceiveAdWithError:(NSError *)error{
    NSLog(@"Error loading");
}

-(void)bannerViewDidLoadAd:(ADBannerView *)banner{
    NSLog(@"Ad loaded");
}
-(void)bannerViewWillLoadAd:(ADBannerView *)banner{
    NSLog(@"Ad will load");
}
-(void)bannerViewActionDidFinish:(ADBannerView *)banner{
    NSLog(@"Ad did finish");

}
@end