处理自适应展示广告

使用条件 Type = RESPONSIVE_DISPLAY_AD 创建广告迭代器目前只会迭代旧版广告。此条件已被弃用；请更新现有代码以明确使用 Type = LEGACY_RESPONSIVE_DISPLAY_AD。如需创建支持多种文字、图片和视频素材资源的广告的广告迭代器，请使用条件 Type = MULTI_ASSET_RESPONSIVE_DISPLAY_AD。

以下代码段展示了这两种自适应展示广告在 API 方面的一些异同。如需了解详情，请参阅自适应展示广告参考文档。

    // let legacyRdaIterator = AdsApp.ads().withCondition("Type = RESPONSIVE_DISPLAY_AD").get();
    let legacyRdaIterator = AdsApp.ads().withCondition("Type = LEGACY_RESPONSIVE_DISPLAY_AD").get();
    while (legacyRdaIterator.hasNext()) {
      let responsiveDisplayAd = legacyRdaIterator.next().asType().responsiveDisplayAd();

      // Legacy responsive display ads have just one long headline.
      let longHeadline = responsiveDisplayAd.getLongHeadline();

      // And they have one short headline, too.
      let shortHeadline = responsiveDisplayAd.getShortHeadline();

      // This call to .getHeadlines() returns null, because the method is not
      // meaningful when called on a legacy responsive display ad.
      assert(responsiveDisplayAd.getHeadlines() === null);

      // ... etc. ...
    }

    let rdaIterator = AdsApp.ads().withCondition("Type = MULTI_ASSET_RESPONSIVE_DISPLAY_AD").get();
    while (rdaIterator.hasNext()) {
      let responsiveDisplayAd = rdaIterator.next().asType().responsiveDisplayAd();

      // Responsive display ads have just one long headline.
      let longHeadline = responsiveDisplayAd.getLongHeadline();

      // But they can have multiple short headline text assets.
      let shortHeadlineAssets = responsiveDisplayAd.getHeadlines();

      // This call to .getShortHeadline() returns null, because the method is only
      // meaningful when called on a legacy responsive display ad.
      assert(responsiveDisplayAd.getShortHeadline() === null);

      // ... etc. ...
    }

    let rdaAndLegacyIterator = AdsApp.ads().withCondition("Type IN [LEGACY_RESPONSIVE_DISPLAY_AD, MULTI_ASSET_RESPONSIVE_DISPLAY_AD]").get();
    while (rdaAndLegacyIterator.hasNext()) {
      let responsiveDisplayAd = legacyRdaIterator.next().asType().responsiveDisplayAd();
      let longHeadline = responsiveDisplayAd.getLongHeadline();

      // The .isLegacy() method can be used to differentiate between responsive
      // display ad types within an iterator over both.
      if (responsiveDisplayAd.isLegacy()) {
        let shortHeadline = responsiveDisplayAd.getShortHeadline();
        // ... etc. ...
      } else {
        let shortHeadlineAssets = responsiveDisplayAd.getHeadlines();
        // ... etc. ...
      }
    }