智慧型橫幅廣告是一種廣告單元，可以在任何大小的裝置螢幕上，以直向/橫向顯示與畫面同寬的橫幅廣告。智慧型橫幅廣告會偵測裝置在目前螢幕方向的寬度，並建立該大小的廣告檢視區塊。
iPhone 上的智慧型橫幅廣告，在直向模式下的高度為 50 點，橫向模式下則為 32 點。在 iPad 上，無論螢幕是直向或橫向，廣告高度均為 90 點。
如果圖像廣告不夠大，無法佔滿整個分配的空間，系統會將圖像置中，並填滿兩側的空間。
如要使用智慧型橫幅廣告，只要為廣告大小指定 kGADAdSizeSmartBannerPortrait (直向) 或 kGADAdSizeSmartBannerLandscape (橫向) 即可：
Swift
let bannerView = GADBannerView(adSize: kGADAdSizeSmartBannerPortrait)
Objective-C
GADBannerView *bannerView = [[GADBannerView alloc] initWithAdSize:kGADAdSizeSmartBannerPortrait];
由於 iOS 11 多出了安全區域，建議您為全螢幕寬度橫幅廣告的邊緣加上限制，才能符合安全區域的邊緣。操作方式如下方程式碼片段所示：
Swift
func addBannerViewToView(_ bannerView: GADBannerView) { bannerView.translatesAutoresizingMaskIntoConstraints = false view.addSubview(bannerView) if #available(iOS 11.0, *) { // In iOS 11, we need to constrain the view to the safe area. positionBannerViewFullWidthAtBottomOfSafeArea(bannerView) } else { // In lower iOS versions, safe area is not available so we use // bottom layout guide and view edges. positionBannerViewFullWidthAtBottomOfView(bannerView) } } // MARK: - view positioning @available (iOS 11, *) func positionBannerViewFullWidthAtBottomOfSafeArea(_ bannerView: UIView) { // Position the banner. Stick it to the bottom of the Safe Area. // Make it constrained to the edges of the safe area. let guide = view.safeAreaLayoutGuide NSLayoutConstraint.activate([ guide.leftAnchor.constraint(equalTo: bannerView.leftAnchor), guide.rightAnchor.constraint(equalTo: bannerView.rightAnchor), guide.bottomAnchor.constraint(equalTo: bannerView.bottomAnchor) ]) } func positionBannerViewFullWidthAtBottomOfView(_ bannerView: UIView) { view.addConstraint(NSLayoutConstraint(item: bannerView, attribute: .leading, relatedBy: .equal, toItem: view, attribute: .leading, multiplier: 1, constant: 0)) view.addConstraint(NSLayoutConstraint(item: bannerView, attribute: .trailing, relatedBy: .equal, toItem: view, attribute: .trailing, multiplier: 1, constant: 0)) view.addConstraint(NSLayoutConstraint(item: bannerView, attribute: .bottom, relatedBy: .equal, toItem: bottomLayoutGuide, attribute: .top, multiplier: 1, constant: 0)) }
Objective-C
- (void)addBannerViewToView:(UIView *)bannerView { bannerView.translatesAutoresizingMaskIntoConstraints = NO; [self.view addSubview:bannerView]; if (@available(ios 11.0, *)) { // In iOS 11, we need to constrain the view to the safe area. [self positionBannerViewFullWidthAtBottomOfSafeArea:bannerView]; } else { // In lower iOS versions, safe area is not available so we use // bottom layout guide and view edges. [self positionBannerViewFullWidthAtBottomOfView:bannerView]; } } #pragma mark - view positioning - (void)positionBannerViewFullWidthAtBottomOfSafeArea:(UIView *_Nonnull)bannerView NS_AVAILABLE_IOS(11.0) { // Position the banner. Stick it to the bottom of the Safe Area. // Make it constrained to the edges of the safe area. UILayoutGuide *guide = self.view.safeAreaLayoutGuide; [NSLayoutConstraint activateConstraints:@[ [guide.leftAnchor constraintEqualToAnchor:bannerView.leftAnchor], [guide.rightAnchor constraintEqualToAnchor:bannerView.rightAnchor], [guide.bottomAnchor constraintEqualToAnchor:bannerView.bottomAnchor] ]]; } - (void)positionBannerViewFullWidthAtBottomOfView:(UIView *_Nonnull)bannerView { [self.view addConstraint:[NSLayoutConstraint constraintWithItem:bannerView attribute:NSLayoutAttributeLeading relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeading multiplier:1 constant:0]]; [self.view addConstraint:[NSLayoutConstraint constraintWithItem:bannerView attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeTrailing multiplier:1 constant:0]]; [self.view addConstraint:[NSLayoutConstraint constraintWithItem:bannerView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.bottomLayoutGuide attribute:NSLayoutAttributeTop multiplier:1 constant:0]]; }