如何控制广告横幅在屏幕上的显示位置？

Question

早上好，

我正在尝试将广告横幅设置为显示在屏幕顶部或底部的某个位置，所以我一直在做的是这样的；

 if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
    {

        bannerView_ = [[GADBannerView alloc] initWithAdSize:kGADAdSizeSmartBannerPortrait];
        bannerView_.adUnitID = MY_BANNER_UNIT_ID;
        CGRect screenRect = [[UIScreen mainScreen] bounds];
        CGFloat screenWidth = screenRect.size.width;
        CGFloat screenHeight = screenRect.size.height;
        CGFloat screenXPos = (screenWidth /2);
        CGFloat screenYPos = screenHeight - 150;
        [bannerView_ setCenter:CGPointMake(screenXPos, screenYPos)];
        bannerView_.rootViewController = self;
        bannerView_.adUnitID = MY_BANNER_UNIT_ID;
        bannerView_.rootViewController = self;
        [self.view addSubview:bannerView_];

    }else{

        bannerView_ = [[GADBannerView alloc] initWithAdSize:kGADAdSizeSmartBannerPortrait];
        bannerView_.adUnitID = MY_BANNER_UNIT_ID;
        CGRect screenRect = [[UIScreen mainScreen] bounds];
        CGFloat screenWidth = screenRect.size.width;
        CGFloat screenHeight = screenRect.size.height;
        CGFloat screenXPos = (screenWidth /2);
        CGFloat screenYPos = screenHeight -480;
        [bannerView_ setCenter:CGPointMake(screenXPos, screenYPos)];
        bannerView_.rootViewController = self;
        bannerView_.adUnitID = MY_BANNER_UNIT_ID;
        bannerView_.rootViewController = self;
        [self.view addSubview:bannerView_];

它非常不整洁，并不能真正按照我的意愿工作，例如，我希望广告横幅出现在任何设备（iPad/iPhone 等）的顶部大约 150 像素处

在界面生成器中创建横幅视图会更好吗？但是如果是这样的话，我将如何实现上面的代码呢？

提前致谢！

Answer 1

bannerView_ = [[GADBannerView alloc] initWithAdSize:kGADAdSizeSmartBannerPortrait];
        bannerView_.adUnitID = MY_BANNER_UNIT_ID;
       bannerView.frame = CGRectMake(0, 0, 320,150);
     [bannerView_ setCenter:CGPointMake(screenXPos, screenYPos)];
        bannerView_.rootViewController = self;
        bannerView_.adUnitID = MY_BANNER_UNIT_ID;
        bannerView_.rootViewController = self;
        [self.view addSubview:bannerView_];