顯示系統定義的原生廣告格式
當原生廣告載入後,您的應用程式會透過 GADAdLoaderDelegate
協定的方法收到一個原生廣告物件,接著負責顯示廣告 (不一定要立即顯示)。為方便呈現系統定義的廣告格式,SDK 提供了一些實用資源。
GADNativeAdView
GADNativeAd
對應的「廣告檢視區塊」類別是 GADNativeAdView
。這個廣告檢視區塊類別是一個 UIView
,供發布商用來呈現廣告。例如,一個 GADNativeAdView
可以顯示單一的 GADNativeAd
例項。所有用來呈現廣告素材資源的 UIView
物件,都應做為這個 GADNativeAdView
物件的子檢視區塊。
舉例來說,如要在 UITableView
中顯示廣告,其中一個儲存格的檢視區塊階層可能如下所示:
GADNativeAdView
類別也提供 IBOutlets
,用於註冊每個素材資源所用的檢視區塊,以及註冊 GADNativeAd
物件本身的方法。透過這種方式註冊檢視區塊後,SDK 就能自動處理以下工作:
- 記錄點擊。
- 記錄曝光 (當廣告的第一個像素出現在螢幕上時)。
- 顯示 AdChoices 廣告標籤。
AdChoices 廣告標籤
對於間接原生廣告 (透過 Ad Manager 候補廣告、Ad Exchange 或 AdSense 放送),SDK 會自動加入 AdChoices 廣告標籤。請在原生廣告檢視區塊中選一個角落預留空間,供系統自動插入 AdChoices 標誌,並確保圖示在該位置清晰可見。如要進一步瞭解這個廣告標籤的外觀與功能,請參閱程式輔助原生廣告導入指南。
程式輔助原生廣告的廣告標示
顯示程式輔助原生廣告時,必須加上廣告標示,表明該檢視區塊為廣告內容,詳情請參閱政策規範。程式碼範例
接下來,我們將示範如何使用從 xib 檔案動態載入的檢視區塊來顯示原生廣告。當 GADAdLoaders
設為請求多種格式時,這種做法非常實用。
設計 UIView 布局
第一步是擺放用來呈現原生廣告素材資源的 UIViews
。您可以像建立其他 xib 檔案一樣,在 Interface Builder 中完成這項設定。以下是一個原生廣告版面配置範例:
請注意圖片右上方的「Custom Class」值已設為
GADNativeAdView
,這個類別就是用來呈現 GADNativeAd
的廣告檢視區塊。
您也需要設定 GADMediaView
的自訂類別,用於呈現廣告的影片或圖片。
將 outlet 連結至檢視區塊
當檢視區塊就位,版面配置也已指定正確的廣告檢視區塊類別後,請將廣告檢視區塊的素材資源 outlet,連結至已建立的 UIViews
。以下示範如何將廣告檢視區塊的素材資源 outlet,連結至建立給廣告的 UIViews
:
在 outlet 面板中,GADNativeAdView
中的 outlet 已連結至 Interface Builder 中擺放的 UIViews
。這樣 SDK 就能知道每個 UIView
會顯示的素材資源。另請注意,這些 outlet 代表廣告中可點擊的檢視區塊。
顯示廣告
完成版面配置並連結 outlet 後,請在應用程式中加入下列程式碼,讓廣告載入後能立即顯示:
Swift
// Mark: - NativeAdLoaderDelegate
func adLoader(_ adLoader: AdLoader, didReceive nativeAd: NativeAd) {
print("Received native ad: \(nativeAd)")
refreshAdButton.isEnabled = true
// Create and place ad in view hierarchy.
let nibView = Bundle.main.loadNibNamed("NativeAdView", owner: nil, options: nil)?.first
guard let nativeAdView = nibView as? NativeAdView else {
return
}
setAdView(nativeAdView)
// Set ourselves as the native ad delegate to be notified of native ad events.
nativeAd.delegate = self
// Populate the native ad view with the native ad assets.
// The headline and mediaContent are guaranteed to be present in every native ad.
(nativeAdView.headlineView as? UILabel)?.text = nativeAd.headline
nativeAdView.mediaView?.mediaContent = nativeAd.mediaContent
// This app uses a fixed width for the MediaView and changes its height to match the aspect
// ratio of the media it displays.
if let mediaView = nativeAdView.mediaView, nativeAd.mediaContent.aspectRatio > 0 {
let heightConstraint = NSLayoutConstraint(
item: mediaView,
attribute: .height,
relatedBy: .equal,
toItem: mediaView,
attribute: .width,
multiplier: CGFloat(1 / nativeAd.mediaContent.aspectRatio),
constant: 0)
heightConstraint.isActive = true
}
// These assets are not guaranteed to be present. Check that they are before
// showing or hiding them.
(nativeAdView.bodyView as? UILabel)?.text = nativeAd.body
nativeAdView.bodyView?.isHidden = nativeAd.body == nil
(nativeAdView.callToActionView as? UIButton)?.setTitle(nativeAd.callToAction, for: .normal)
nativeAdView.callToActionView?.isHidden = nativeAd.callToAction == nil
(nativeAdView.iconView as? UIImageView)?.image = nativeAd.icon?.image
nativeAdView.iconView?.isHidden = nativeAd.icon == nil
(nativeAdView.starRatingView as? UIImageView)?.image = imageOfStars(
fromStarRating: nativeAd.starRating)
nativeAdView.starRatingView?.isHidden = nativeAd.starRating == nil
(nativeAdView.storeView as? UILabel)?.text = nativeAd.store
nativeAdView.storeView?.isHidden = nativeAd.store == nil
(nativeAdView.priceView as? UILabel)?.text = nativeAd.price
nativeAdView.priceView?.isHidden = nativeAd.price == nil
(nativeAdView.advertiserView as? UILabel)?.text = nativeAd.advertiser
nativeAdView.advertiserView?.isHidden = nativeAd.advertiser == nil
// For the SDK to process touch events properly, user interaction should be disabled.
nativeAdView.callToActionView?.isUserInteractionEnabled = false
// Associate the native ad view with the native ad object. This is
// required to make the ad clickable.
// Note: this should always be done after populating the ad views.
nativeAdView.nativeAd = nativeAd
}
SwiftUI
建立檢視區塊模型
您可以建立檢視區塊模型,用於載入原生廣告及發布廣告資料異動:
import GoogleMobileAds
class NativeAdViewModel: NSObject, ObservableObject, NativeAdLoaderDelegate {
@Published var nativeAd: NativeAd?
private var adLoader: AdLoader!
func refreshAd() {
adLoader = AdLoader(
adUnitID: "ca-app-pub-3940256099942544/3986624511",
// The UIViewController parameter is optional.
rootViewController: nil,
adTypes: [.native], options: nil)
adLoader.delegate = self
adLoader.load(Request())
}
func adLoader(_ adLoader: AdLoader, didReceive nativeAd: NativeAd) {
// Native ad data changes are published to its subscribers.
self.nativeAd = nativeAd
nativeAd.delegate = self
}
func adLoader(_ adLoader: AdLoader, didFailToReceiveAdWithError error: Error) {
print("\(adLoader) failed with error: \(error.localizedDescription)")
}
}
建立 UIViewRepresentable
建立 NativeView
的 UIViewRepresentable
,並監控 ViewModel
類別中資料的異動。
private struct NativeAdViewContainer: UIViewRepresentable {
typealias UIViewType = NativeAdView
// Observer to update the UIView when the native ad value changes.
@ObservedObject var nativeViewModel: NativeAdViewModel
func makeUIView(context: Context) -> NativeAdView {
return
Bundle.main.loadNibNamed(
"NativeAdView",
owner: nil,
options: nil)?.first as! NativeAdView
}
func updateUIView(_ nativeAdView: NativeAdView, context: Context) {
guard let nativeAd = nativeViewModel.nativeAd else { return }
// Each UI property is configurable using your native ad.
(nativeAdView.headlineView as? UILabel)?.text = nativeAd.headline
nativeAdView.mediaView?.mediaContent = nativeAd.mediaContent
(nativeAdView.bodyView as? UILabel)?.text = nativeAd.body
(nativeAdView.iconView as? UIImageView)?.image = nativeAd.icon?.image
(nativeAdView.starRatingView as? UIImageView)?.image = imageOfStars(from: nativeAd.starRating)
(nativeAdView.storeView as? UILabel)?.text = nativeAd.store
(nativeAdView.priceView as? UILabel)?.text = nativeAd.price
(nativeAdView.advertiserView as? UILabel)?.text = nativeAd.advertiser
(nativeAdView.callToActionView as? UIButton)?.setTitle(nativeAd.callToAction, for: .normal)
// For the SDK to process touch events properly, user interaction should be disabled.
nativeAdView.callToActionView?.isUserInteractionEnabled = false
// Associate the native ad view with the native ad object. This is required to make the ad
// clickable.
// Note: this should always be done after populating the ad views.
nativeAdView.nativeAd = nativeAd
}
將檢視區塊新增至檢視區塊階層
以下示範如何將 UIViewRepresentable
新增至檢視區塊階層:
struct NativeContentView: View {
// Single source of truth for the native ad data.
@StateObject private var nativeViewModel = NativeAdViewModel()
var body: some View {
ScrollView {
VStack(spacing: 20) {
// Updates when the native ad data changes.
NativeAdViewContainer(nativeViewModel: nativeViewModel)
.frame(minHeight: 300) // minHeight determined from xib.
Objective-C
#pragma mark GADNativeAdLoaderDelegate implementation
- (void)adLoader:(GADAdLoader *)adLoader didReceiveNativeAd:(GADNativeAd *)nativeAd {
NSLog(@"Received native ad: %@", nativeAd);
self.refreshButton.enabled = YES;
// Create and place ad in view hierarchy.
GADNativeAdView *nativeAdView =
[[NSBundle mainBundle] loadNibNamed:@"NativeAdView" owner:nil options:nil].firstObject;
[self setAdView:nativeAdView];
// Set the mediaContent on the GADMediaView to populate it with available
// video/image asset.
nativeAdView.mediaView.mediaContent = nativeAd.mediaContent;
// Populate the native ad view with the native ad assets.
// The headline is present in every native ad.
((UILabel *)nativeAdView.headlineView).text = nativeAd.headline;
// These assets are not guaranteed to be present. Check that they are before
// showing or hiding them.
((UILabel *)nativeAdView.bodyView).text = nativeAd.body;
nativeAdView.bodyView.hidden = nativeAd.body ? NO : YES;
[((UIButton *)nativeAdView.callToActionView)setTitle:nativeAd.callToAction
forState:UIControlStateNormal];
nativeAdView.callToActionView.hidden = nativeAd.callToAction ? NO : YES;
((UIImageView *)nativeAdView.iconView).image = nativeAd.icon.image;
nativeAdView.iconView.hidden = nativeAd.icon ? NO : YES;
((UIImageView *)nativeAdView.starRatingView).image = [self imageForStars:nativeAd.starRating];
nativeAdView.starRatingView.hidden = nativeAd.starRating ? NO : YES;
((UILabel *)nativeAdView.storeView).text = nativeAd.store;
nativeAdView.storeView.hidden = nativeAd.store ? NO : YES;
((UILabel *)nativeAdView.priceView).text = nativeAd.price;
nativeAdView.priceView.hidden = nativeAd.price ? NO : YES;
((UILabel *)nativeAdView.advertiserView).text = nativeAd.advertiser;
nativeAdView.advertiserView.hidden = nativeAd.advertiser ? NO : YES;
// In order for the SDK to process touch events properly, user interaction
// should be disabled.
nativeAdView.callToActionView.userInteractionEnabled = NO;
// Associate the native ad view with the native ad object. This is
// required to make the ad clickable.
nativeAdView.nativeAd = nativeAd;
}
GitHub 完整範例程式碼
點選下方的 GitHub 連結,即可查看使用 Swift、SwiftUI 和 Objective-C 整合原生廣告的完整範例。
Swift 自訂顯示範例 SwiftUI 原生廣告範例 Objective-C 自訂顯示範例
GADMediaView
圖片和影片素材資源會透過 GADMediaView
顯示給使用者。這個 UIView
可以在 xib 檔案中定義,也可以動態建構,而且和其他素材資源檢視區塊一樣,應加入 GADNativeAdView
的檢視區塊階層。
和其他素材資源檢視區塊一樣,媒體檢視區塊需要填入內容才能正常顯示。您可以透過 GADMediaView
的 mediaContent
屬性設定內容,而 GADNativeAd
的 mediaContent
屬性則提供可傳遞至 GADMediaView
的媒體內容。
以下是自訂顯示範例 (Swift
| Objective-C) 的程式碼片段,示範如何將 GADNativeAd
的 GADMediaContent
填入 GADMediaView
,呈現原生廣告素材資源:
Swift
nativeAdView.mediaView?.mediaContent = nativeAd.mediaContent
Objective-C
nativeAdView.mediaView.mediaContent = nativeAd.mediaContent;
在 Interface Builder 檔案中,請確認原生廣告檢視區塊的自訂類別已設為 GADMediaView
,並連結至 mediaView
outlet。
變更圖片內容模式
GADMediaView
類別在顯示圖片時,會遵循 UIView
的 contentMode
屬性設定。如想調整圖片在 GADMediaView
中的縮放方式,請在 GADMediaView
的 contentMode
屬性上設定對應的 UIViewContentMode
。
例如,當廣告沒有影片時,顯示圖片並填滿 GADMediaView
:
Swift
nativeAdView.mediaView?.contentMode = .aspectFill
Objective-C
nativeAdView.mediaView.contentMode = UIViewContentModeAspectFill;
GADMediaContent
GADMediaContent
類別會保存與原生廣告媒體內容相關的資料,而這些資料會透過 GADMediaView
類別顯示。當這個類別設定至 GADMediaView
的 mediaContent
屬性時:
如果廣告包含影片素材資源,影片會先緩衝處理,然後在
GADMediaView
中播放。您可以檢查hasVideoContent
來確定是否有影片素材資源。如果廣告不含影片素材資源,系統會下載
mainImage
素材資源並顯示在GADMediaView
中。
後續步驟
進一步瞭解使用者隱私。