顯示系統定義的原生廣告格式
原生廣告載入時，應用程式會透過其中一個 GADAdLoaderDelegate 通訊協定訊息接收原生廣告物件。接著，您的應用程式會負責顯示廣告 (但不一定需要立即顯示)。為讓您更輕鬆地顯示系統定義的廣告格式，SDK 提供一些實用的資源。
GADNativeAdView
對於 GADNativeAd，有對應的「ad view」類別：GADNativeAdView。這個廣告檢視類別是發布商應用於顯示廣告的 UIView。舉例來說，單一 GADNativeAdView 可以顯示單一 GADNativeAd 例項。用來顯示廣告素材資源的每個 UIView 物件，都應為該 GADNativeAdView 物件的子檢視畫面。
舉例來說，如果您在 UITableView 中顯示廣告，其中一個儲存格的檢視階層可能會像這樣：
GADNativeAdView 類別也提供 IBOutlets，用於註冊用於個別資產的檢視畫面，以及註冊 GADNativeAd 物件本身的方法。以這種方式註冊檢視畫面，可讓 SDK 自動處理下列任務：
- 記錄點擊次數。
- 記錄曝光次數 (當畫面上顯示第一個像素時)。
- 顯示 AdChoices 重疊廣告。
AdChoices 重疊廣告
如果是間接原生廣告 (透過 Ad Manager 候補或透過 Ad Exchange 或 AdSense 放送)，SDK 會加入 AdChoices 重疊層。請在原生廣告檢視畫面的偏好角落留出空間，以便自動插入 AdChoices 標誌。並確認安插在內容中的 AdChoices 廣告標籤清楚且容易辨識。如要進一步瞭解疊加層的外觀和功能，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歸因
顯示程式輔助原生廣告時，您必須顯示廣告歸因資訊，以表示該視圖是廣告。詳情請參閱我們的政策指南。程式碼範例
讓我們來看看如何使用從 xib 檔案動態載入的檢視畫面，顯示原生廣告。當您使用已設定為要求多種格式的 GADAdLoaders 時，這可能會非常實用。
排版 UIView
第一步是排版 UIViews，以便顯示原生廣告素材資源。您可以在 Interface Builder 中執行這項操作，就像建立任何其他 xib 檔案一樣。原生廣告的版面配置可能會像這樣：
請注意圖片右上方的「自訂類別」值。已設為
GADNativeAdView：這是用於顯示 GADNativeAd 的廣告檢視畫面類別。
您也必須為 GADMediaView 設定自訂類別，用於顯示廣告的影片或圖片。
將管道連結至檢視畫面
將檢視畫面放置到適當位置，並將正確的廣告檢視畫面類別指派給版面配置後，請將廣告檢視畫面的資產輸出連結至您建立的 UIViews。以下說明如何將廣告檢視畫面的素材資源輸出連結至為廣告建立的 UIViews：
在「outlet」面板中，GADNativeAdView 中的「outlet」已連結至 Interface Builder 中排列的 UIViews。這可讓 SDK 瞭解哪個 UIView 會顯示哪個素材資源。請務必記住，這些管道代表在廣告中可點選的觀看次數。
顯示廣告
版面配置完成並連結了出口後，請將下列程式碼新增至應用程式，以便在載入廣告時顯示廣告：
Swift
// Mark: - GADNativeAdLoaderDelegate
func adLoader(_ adLoader: GADAdLoader, didReceive nativeAd: GADNativeAd) {
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? GADNativeAdView 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 GADMediaView 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
建立檢視模型
建立可載入原生廣告的檢視區塊模型，並發布原生廣告資料變更：
import GoogleMobileAds
class NativeAdViewModel: NSObject, ObservableObject, GADNativeAdLoaderDelegate {
@Published var nativeAd: GADNativeAd?
private var adLoader: GADAdLoader!
func refreshAd() {
adLoader = GADAdLoader(
adUnitID: "ca-app-pub-3940256099942544/3986624511",
// The UIViewController parameter is optional.
rootViewController: nil,
adTypes: [.native], options: nil)
adLoader.delegate = self
adLoader.load(GADRequest())
}
func adLoader(_ adLoader: GADAdLoader, didReceive nativeAd: GADNativeAd) {
// Native ad data changes are published to its subscribers.
self.nativeAd = nativeAd
nativeAd.delegate = self
}
func adLoader(_ adLoader: GADAdLoader, didFailToReceiveAdWithError error: Error) {
print("\(adLoader) failed with error: \(error.localizedDescription)")
}
}
建立 UIViewRepresentable
為 GADNativeView 建立 UIViewRepresentable，並訂閱 ViewModel 類別中的資料變更：
private struct NativeAdView: UIViewRepresentable {
typealias UIViewType = GADNativeAdView
// Observer to update the UIView when the native ad value changes.
@ObservedObject var nativeViewModel: NativeAdViewModel
func makeUIView(context: Context) -> GADNativeAdView {
return
Bundle.main.loadNibNamed(
"NativeAdView",
owner: nil,
options: nil)?.first as! GADNativeAdView
}
func updateUIView(_ nativeAdView: GADNativeAdView, 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
}
將檢視區塊加入檢視區塊階層
以下程式碼示範如何將 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) {
NativeAdView(nativeViewModel: nativeViewModel) // Updates when the native ad data changes.
.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 上的完整範例
如要查看在 Swift、SwiftUI 和 Objective-C 中整合原生廣告的完整範例，請點選相應的 GitHub 連結。
Swift 自訂轉譯範例 SwiftUI 原生廣告範例 Objective-C 自訂轉譯範例
GADMediaView
圖片和影片素材資源會透過 GADMediaView 向使用者顯示。這是可在 xib 檔案中定義或動態建構的 UIView。它應放置在 GADNativeAdView 的檢視區塊階層中，就像任何其他資產檢視畫面一樣。
如同所有素材資源檢視畫面，媒體檢視畫面也需要填入內容。您可以使用 GADMediaView 上的 mediaContent 屬性設定這項屬性。GADNativeAd 的 mediaContent 屬性包含可傳遞至 GADMediaView 的媒體內容。
以下是自訂轉譯範例 (Swift | Objective-C) 的程式碼片段，說明如何使用 GADNativeAd 中的 GADMediaContent，為 GADMediaView 填入原生廣告素材資源：
Swift
nativeAdView.mediaView?.mediaContent = nativeAd.mediaContent
Objective-C
nativeAdView.mediaView.mediaContent = nativeAd.mediaContent;
請確認在原生廣告檢視畫面的介面建構工具檔案中，已將檢視畫面自訂類別設為 GADMediaView，並將其連結至 mediaView 出口。
變更圖片內容模式
GADMediaView 類別會在顯示圖片時尊重 UIView
contentMode 屬性。如要變更圖片在 GADMediaView 中的縮放方式，請在 GADMediaView 的 contentMode 屬性上設定對應的 UIViewContentMode，即可達成這項目標。
舉例來說，如要填入 GADMediaView (廣告沒有影片) 以顯示圖片：
Swift
nativeAdView.mediaView?.contentMode = .aspectFill
Objective-C
nativeAdView.mediaView.contentMode = UIViewContentModeAspectFill;
GADMediaContent
GADMediaContent 類別會保留與原生廣告媒體內容相關的資料，並使用 GADMediaView 類別顯示。在 GADMediaView
mediaContent 屬性上設定時：
如果有可用的影片素材資源，系統會進行緩衝，並開始在
GADMediaView中播放。您可以檢查hasVideoContent，判斷影片素材資源是否可用。如果廣告不含影片素材資源，系統會下載
mainImage素材資源，並將其放入GADMediaView中。
後續步驟
進一步瞭解使用者隱私權。