iAd 总结

iAds是SDK4.0所出现的又一新特性，只要加入Apple的iAd Network，你就可以在程序中使用iAd为你的程序带来额外的收益。在此之前iPhone程序中的广告大多靠google ads实现，现在的SDK4.0的这一新特性又为我们在itunes store通过广告上获得收益提供了新的方法。

iAds的基本步骤
1.首先登陆你的Apple开发者ID。并且登陆到itunes connect签署同意条款。
2.完善你的contact，bank和tax信息，这时在你的itunes connect中就多了iAds管理这一项。
3.将 iAd .framework添加到你的工程，并实现其代理。

使用方法
1.创建ADBannerView
ADBannerView *adView = [[ADBannerView alloc] initWithFrame:CGRectZero];
adView.currentContentSizeIdentifier = ADBannerContentSizeIdentifier320x50;
[self.view addSubview:adView];

2.广告点击效果设置（是否允许弹出广告，或是退出应用程序播放广告）返回YES为允许，willLeave表示广告是否会离开当前应用程序
- (BOOL)bannerViewActionShouldBegin:(ADBannerView *)banner willLeaveApplication:(BOOL)willLeave
{
    NSLog(@"Banner view is beginning an ad action");
    BOOL shouldExecuteAction = [self allowActionToRun]; // your application implements this method
    if (!willLeave && shouldExecuteAction)
    {
        // insert code here to suspend any services that might conflict with the advertisement
    }
    return shouldExecuteAction;
}

3.显示和隐藏广告
- (void)bannerViewDidLoadAd:(ADBannerView *)banner
{
    if (!self.bannerIsVisible)
    {
        [UIView beginAnimations:@"animateAdBannerOn" context:NULL];
        // assumes the banner view is offset 50 pixels so that it is not visible.
        banner.frame = CGRectOffset(banner.frame, 0, 50);
        [UIView commitAnimations];
        self.bannerIsVisible = YES;
    }
}

- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error
{
    if (self.bannerIsVisible)
    {
        [UIView beginAnimations:@"animateAdBannerOff" context:NULL];
        // assumes the banner view is at the top of the screen.
        banner.frame = CGRectOffset(banner.frame, 0, -50);
        [UIView commitAnimations];
        self.bannerIsVisible = NO;
    }
}