广告加载错误

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如果广告加载失败，系统会调用委托方法或完成处理程序，并提供 NSError 对象。

对于 GADBannerView，系统将调用以下内容：

Swift

func bannerView(_ bannerView: BannerView, didFailToReceiveAdWithError error: Error)

Objective-C

- (void)bannerView:(nonnull GADBannerView *)bannerView
    didFailToReceiveAdWithError:(nonnull NSError *)error;

以下示例展示了广告加载失败时可用的信息：

Swift

func bannerView(_ bannerView: BannerView, didFailToReceiveAdWithError error: Error) {
    // Gets the domain from which the error came.
    let errorDomain = error.domain
    // Gets the error code. See
    // https://developers.google.com/admob/ios/api/reference/Enums/GADErrorCode
    // for a list of possible codes.
    let errorCode = error.code
    // Gets an error message.
    // For example "Account not approved yet". See
    // https://support.google.com/admob/answer/9905175 for explanations of
    // common errors.
    let errorMessage = error.localizedDescription
    // Gets additional response information about the request. See
    // https://developers.google.com/admob/ios/response-info for more information.
    let responseInfo = (error as NSError).userInfo[GADErrorUserInfoKeyResponseInfo] as? ResponseInfo
    // Gets the underlyingError, if available.
    let underlyingError = (error as NSError).userInfo[NSUnderlyingErrorKey] as? Error
    if let responseInfo = responseInfo {
        print("Received error with domain: \(errorDomain), code: \(errorCode),"
          + "message: \(errorMessage), responseInfo: \(responseInfo),"
          + "underlyingError: \(underlyingError?.localizedDescription ?? "nil")")
    }
}

Objective-C

- (void)bannerView:(GADBannerView *)bannerView
    didFailToReceiveAdWithError:(NSError *)error {
  // Gets the domain from which the error came.
  NSString *errorDomain = error.domain;
  // Gets the error code. See
  // https://developers.google.com/admob/ios/api/reference/Enums/GADErrorCode
  // for a list of possible codes.
  int errorCode = error.code;
  // Gets an error message.
  // For example "Account not approved yet". See
  // https://support.google.com/admob/answer/9905175 for explanations of
  // common errors.
  NSString *errorMessage = error.localizedDescription;
  // Gets additional response information about the request. See
  // https://developers.google.com/admob/ios/response-info for more
  // information.
  GADResponseInfo *responseInfo = error.userInfo[GADErrorUserInfoKeyResponseInfo];
  // Gets the underlyingError, if available.
  NSError *underlyingError = error.userInfo[NSUnderlyingErrorKey];
  NSLog(@"Received error with domain: %@, code: %ld, message: %@, "
        @"responseInfo: %@, underlyingError: %@",
        errorDomain, errorCode, errorMessage, responseInfo,
        underlyingError.localizedDescription);
}
对于域 GADErrorDomain 下的错误，localizedDescription 的更多详细说明可在“解决常见的新手入门问题”一文中查询，并了解在解决问题时可以采取的措施。