iPhoneアプリに広告を表示する

pubspec.yaml

dependencies:
  flutter:
    sdk: flutter

  google_mobile_ads: ^3.0.0

ios\Runner\Info.plist

<key>GADApplicationIdentifier</key>
<string>ca-app-pub-6360703854329045~6028133xxx</string>
<key>SKAdNetworkItems</key>
<array>
  <dict>
    <key>SKAdNetworkIdentifier</key>
    <string>cstr6suwn9.skadnetwork</string>
  </dict>
....
</array>

main.dart

//AdMobの初期化処理
void main() {
  WidgetsFlutterBinding.ensureInitialized();
  MobileAds.instance.initialize();
  runApp(const MainApp());
}

class _MyHomePageState extends State<MyHomePage> {
  final BannerAd myBanner = BannerAd(
    adUnitId: AD_UNIT_ID,
    size: AdSize.banner,
    request: AdRequest(),
    listener: BannerAdListener(),
  );

  final BannerAdListener listener = BannerAdListener(
    // Called when an ad is successfully received.
    onAdLoaded: (Ad ad) => debugPrint('Ad loaded.'),
    // Called when an ad request failed.
    onAdFailedToLoad: (Ad ad, LoadAdError error) {
      // Dispose the ad here to free resources.
      ad.dispose();
      debugPrint('Ad failed to load: $error');
    },
    // Called when an ad opens an overlay that covers the screen.
    onAdOpened: (Ad ad) => debugPrint('Ad opened.'),
    // Called when an ad removes an overlay that covers the screen.
    onAdClosed: (Ad ad) => debugPrint('Ad closed.'),
    // Called when an impression occurs on the ad.
    onAdImpression: (Ad ad) => debugPrint('Ad impression.'),
  );

  @override
  void initState() {
    super.initState();
    myBanner.load();
  }

  @override
  Widget build(BuildContext context) {
    final AdWidget adWidget = AdWidget(ad: myBanner);
    final Container adContainer = Container(
      alignment: Alignment.center,
      width: myBanner.size.width.toDouble(),
      height: myBanner.size.height.toDouble(),
      child: adWidget,
    );
    return Scaffold(
      body: Center(
        child: Wrap(direction: Axis.horizontal, children: <Widget>[
          adContainer,
        ]),
      ),