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
對於間接原生廣告 (透過 AdMob 候補或透過 Ad Exchange 或 AdSense 放送)，SDK 會加入 AdChoices 重疊。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。
廣告標示
顯示程式輔助原生廣告時，您必須顯示廣告歸屬資訊，以表示該視圖是廣告。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。在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 原生進階範例 SwiftUI 原生廣告範例 Objective-C 原生進階範例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。
以下是原生進階範例 (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。