设置 IMA SDK for DAI

借助 IMA SDK，您可以轻松将多媒体广告集成到您的网站和应用中。IMA SDK 可以从任何 与 VAST 兼容的广告服务器请求广告，并管理应用中的广告播放。借助 IMA DAI SDK，应用可以针对广告和内容视频（VOD 或直播内容）发出流式传输请求。然后，SDK 会返回一个合并的视频串流，这样您就不必在应用中管理广告视频和内容视频之间的切换。

选择您感兴趣的 DAI 解决方案

Pod Serving DAI

本指南演示了如何将 IMA DAI SDK 集成到简单的视频播放器应用中。如果您想查看或跟随已完成的示例集成，请从 GitHub 下载 PodServingExample。

IMA DAI 概览

实现 IMA DAI 涉及四个主要 SDK 组件，如本指南中所示：

  • IMAAdDisplayContainer - 位于视频播放元素之上并包含广告界面元素的容器对象。
  • IMAAdsLoader - 用于请求数据流并处理由数据流请求响应对象触发的事件的对象。您应仅实例化一个广告加载器，该加载器可在应用的整个生命周期内重复使用。
  • IMAStreamRequest - IMAPodVODStreamRequest 或 IMAPodStreamRequest。
  • IMAStreamManager - 用于处理动态广告插播数据流和与 DAI 后端的互动的对象。直播管理器还会处理跟踪 ping，并将直播和广告事件转发给发布商。

此外，如需播放 pod 广告投放串流，您必须实现自定义 VTP 处理程序。此自定义 VTP 处理脚本会将直播 ID 以及 VTP 需要的任何其他信息发送给 VTP，以便 VTP 返回包含内容和接缝广告的直播清单。VTP 将提供有关如何实现自定义 VTP 处理程序的说明。

前提条件

在开始之前，您需要做好以下准备：

您还需要用于向 IMA SDK 请求直播的参数。

直播参数
广告资源网代码 您的 Ad Manager 360 账号的广告资源网代码。
示例：51636543
自定义素材资源键 用于在 Campaign Manager 360 中标识广告连播投放事件的自定义素材资源键。此文件可以由清单操纵器或第三方广告连播投放合作伙伴创建。
示例：google-sample
VOD 视频流参数
广告资源网代码 您的 Ad Manager 360 账号的广告资源网代码。
示例：51636543

创建新的 Xcode 项目

在 Xcode 中，使用 Objective-C 创建一个名为“PodServingExample”的新 iOS 项目。

将 IMA DAI SDK 添加到 Xcode 项目

您可以使用以下三种方法之一安装 IMA DAI SDK。

使用 CocoaPods 安装 SDK（首选）

CocoaPods 是 Xcode 项目的依赖项管理器，是安装 IMA DAI SDK 的推荐方法。如需详细了解如何安装或使用 CocoaPods，请参阅 CocoaPods 文档。安装 CocoaPods 后，请按照以下说明安装 IMA DAI SDK：

  1. 在 PodServingExample.xcodeproj 文件所在的目录中，创建一个名为 Podfile 的文本文件，并添加以下配置：

    Podfile 
    source 'https://github.com/CocoaPods/Specs.git'

platform :ios, '14'

target 'PodServingExample' do
  pod 'GoogleAds-IMA-iOS-SDK'
end

    Podfile

  2. 在包含 Podfile 的目录中，运行以下命令：

    pod install --repo-update

使用 Swift Package Manager 安装 SDK

互动式媒体广告 SDK 支持 3.18.4 及更高版本的 Swift Package Manager。请按照以下步骤导入 Swift 软件包。

  1. 在 Xcode 中，依次前往 File（文件）> Add Packages（添加软件包），安装 IMA DAI SDK Swift 软件包。

  2. 在显示的提示中，搜索 IMA DAI SDK Swift 软件包的 GitHub 代码库：

    https://github.com/googleads/swift-package-manager-google-interactive-media-ads-ios

  3. 选择您要使用的 IMA DAI SDK Swift 软件包版本。对于新项目，我们建议使用 Up to Next Major Version。

完成后，Xcode 会解析您的软件包依赖项，并在后台下载它们。如需详细了解如何添加软件包依赖项，请参阅 Apple 的文章。

手动下载并安装 SDK

如果您不想使用 Swift Package Manager 或 CocoaPods，可以下载 IMA DAI SDK 并将其手动添加到您的项目中。

创建一个简单的视频播放器

使用封装在界面视图中的 AV 播放器，在主视图控制器中实现视频播放器。IMA SDK 使用界面视图来显示广告界面元素。

Objective-C

ViewController.m 
#import "ViewController.h"

#import <AVKit/AVKit.h>

/// Content URL.
static NSString *const kBackupContentUrl =
    @"http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8";

@interface ViewController ()
/// Play button.
@property(nonatomic, weak) IBOutlet UIButton *playButton;

@property(nonatomic, weak) IBOutlet UIView *videoView;
/// Video player.
@property(nonatomic, strong) AVPlayer *videoPlayer;
@end

@implementation ViewController

- (void)viewDidLoad {
  [super viewDidLoad];
  self.view.backgroundColor = [UIColor blackColor];

  // Load AVPlayer with the path to your content.
  NSURL *contentURL = [NSURL URLWithString:kBackupContentUrl];
  self.videoPlayer = [AVPlayer playerWithURL:contentURL];

  // Create a player layer for the player.
  AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.videoPlayer];

  // Size, position, and display the AVPlayer.
  playerLayer.frame = self.videoView.layer.bounds;
  [self.videoView.layer addSublayer:playerLayer];
}

- (IBAction)onPlayButtonTouch:(id)sender {
  [self.videoPlayer play];
  self.playButton.hidden = YES;
}

@end

ViewController.m

Swift

ViewController.swift 
// Copyright 2024 Google LLC. All rights reserved.
//
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License. You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under
// the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
// ANY KIND, either express or implied. See the License for the specific language governing
// permissions and limitations under the License.

import AVFoundation
import UIKit

class ViewController: UIViewController {

  /// Content URL.
  static let backupStreamURLString =
    "http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8"

  /// Play button.
  @IBOutlet private weak var playButton: UIButton!

  @IBOutlet private weak var videoView: UIView!
  /// Video player.
  private var videoPlayer: AVPlayer?

  override func viewDidLoad() {
    super.viewDidLoad()

    playButton.layer.zPosition = CGFloat(MAXFLOAT)

    // Load AVPlayer with path to our content.
    // note: this unwrap is safe because the URL is a constant string.
    let contentURL = URL(string: ViewController.backupStreamURLString)!
    videoPlayer = AVPlayer(url: contentURL)

    // Create a player layer for the player.
    let playerLayer = AVPlayerLayer(player: videoPlayer)

    // Size, position, and display the AVPlayer.
    playerLayer.frame = videoView.layer.bounds
    videoView.layer.addSublayer(playerLayer)
  }

  @IBAction func onPlayButtonTouch(_ sender: Any) {
    videoPlayer?.play()
    playButton.isHidden = true
  }
}

ViewController.swift

初始化广告加载程序

将 IMA SDK 导入到视图控制器中，并采用 IMAAdsLoaderDelegate 和 IMAStreamManagerDelegate 协议来处理广告加载器和串流管理器事件。

添加以下私有属性以存储关键的 IMA SDK 组件：

在视图加载后，初始化广告加载器、广告展示容器和视频显示。

Objective-C

ViewController.m 
@import GoogleInteractiveMediaAds;

// ...

@interface ViewController () <IMAAdsLoaderDelegate, IMAStreamManagerDelegate>
/// The entry point for the IMA DAI SDK to make DAI stream requests.
@property(nonatomic, strong) IMAAdsLoader *adsLoader;
/// The container where the SDK renders each ad's user interface elements and companion slots.
@property(nonatomic, strong) IMAAdDisplayContainer *adDisplayContainer;
/// The reference of your video player for the IMA DAI SDK to monitor playback and handle timed
/// metadata.
@property(nonatomic, strong) IMAAVPlayerVideoDisplay *imaVideoDisplay;
/// References the stream manager from the IMA DAI SDK after successful stream loading.
@property(nonatomic, strong) IMAStreamManager *streamManager;

// ...

@end

@implementation ViewController

- (void)viewDidLoad {
  [super viewDidLoad];

  // ...

  self.adsLoader = [[IMAAdsLoader alloc] initWithSettings:nil];
  self.adsLoader.delegate = self;

  // Create an ad display container for rendering each ad's user interface elements and companion
  // slots.
  self.adDisplayContainer =
      [[IMAAdDisplayContainer alloc] initWithAdContainer:self.videoView
                                          viewController:self
                                          companionSlots:nil];

  // Create an IMAAVPlayerVideoDisplay to give the SDK access to your video player.
  self.imaVideoDisplay = [[IMAAVPlayerVideoDisplay alloc] initWithAVPlayer:self.videoPlayer];
}
ViewController.m

Swift

ViewController.swift 
import GoogleInteractiveMediaAds
// ...

class ViewController: UIViewController, IMAAdsLoaderDelegate, IMAStreamManagerDelegate {
  // ...

  /// The entry point for the IMA DAI SDK to make DAI stream requests.
  private var adsLoader: IMAAdsLoader?
  /// The container where the SDK renders each ad's user interface elements and companion slots.
  private var adDisplayContainer: IMAAdDisplayContainer?
  /// The reference of your video player for the IMA DAI SDK to monitor playback and handle timed
  /// metadata.
  private var imaVideoDisplay: IMAAVPlayerVideoDisplay!
  /// References the stream manager from the IMA DAI SDK after successfully loading the DAI stream.
  private var streamManager: IMAStreamManager?

  // ...

  override func viewDidLoad() {
    super.viewDidLoad()

    // ...

    adsLoader = IMAAdsLoader(settings: nil)
    adsLoader?.delegate = self

    // Create an ad display container for rendering each ad's user interface elements and companion
    // slots.
    adDisplayContainer = IMAAdDisplayContainer(
      adContainer: videoView,
      viewController: self,
      companionSlots: nil)

    // Create an IMAAVPlayerVideoDisplay to give the SDK access to your video player.
    imaVideoDisplay = IMAAVPlayerVideoDisplay(avPlayer: videoPlayer)
  }
ViewController.swift

发出流式请求

当用户按下播放按钮时，发出新的串流请求。 将 IMAPodStreamRequest 类用于直播。对于 VOD 串流，请使用 IMAPodVODStreamRequest 类。

流式传输请求需要您的流式传输参数，以及对广告展示容器和视频显示的引用。

Objective-C

ViewController.m 
- (IBAction)onPlayButtonTouch:(id)sender {
  [self requestStream];
  self.playButton.hidden = YES;
}

- (void)requestStream {
  // Create a stream request.
  IMAStreamRequest *request;
  if (kStreamType == StreamTypeLive) {
    // Live stream request. Replace the network code and custom asset key with your values.
    request = [[IMAPodStreamRequest alloc] initWithNetworkCode:kNetworkCode
                                                customAssetKey:kCustomAssetKey
                                            adDisplayContainer:adDisplayContainer
                                                  videoDisplay:self.videoDisplay
                                         pictureInPictureProxy:nil
                                                   userContext:nil];
  } else {
    // VOD request. Replace the network code with your value.
    request = [[IMAPodVODStreamRequest alloc] initWithNetworkCode:@kNetworkCode
                                               adDisplayContainer:adDisplayContainer
                                                     videoDisplay:self.videoDisplay
                                            pictureInPictureProxy:nil
                                                      userContext:nil];
  }
  [self.adsLoader requestStreamWithRequest:request];
}
ViewController.m

Swift

ViewController.swift 
@IBAction func onPlayButtonTouch(_ sender: Any) {
  requestStream()
  playButton.isHidden = true
}

func requestStream() {
  // Create a stream request. Use one of "Livestream request" or "VOD request".
  if ViewController.requestType == StreamType.live {
    // Livestream request.
    let request = IMAPodStreamRequest(
      networkCode: ViewController.networkCode,
      customAssetKey: ViewController.customAssetKey,
      adDisplayContainer: adDisplayContainer!,
      videoDisplay: self.imaVideoDisplay,
      pictureInPictureProxy: nil,
      userContext: nil)
    adsLoader?.requestStream(with: request)
  } else {
    // VOD stream request.
    let request = IMAPodVODStreamRequest(
      networkCode: ViewController.networkCode,
      adDisplayContainer: adDisplayContainer!,
      videoDisplay: self.imaVideoDisplay,
      pictureInPictureProxy: nil,
      userContext: nil)
    adsLoader?.requestStream(with: request)
  }
}
ViewController.swift

监听数据流加载事件

在流式请求成功初始化或失败时，IMAAdsLoader 类会调用 IMAAdsLoaderDelegate 方法。

在 adsLoadedWithData 委托方法中，设置 IMAStreamManagerDelegate。 将直播 ID 传递给自定义 VTP 处理程序，然后检索直播清单网址。对于直播，请将清单网址加载到视频显示屏中，然后开始播放。对于 VOD 串流，请将清单网址传递给串流管理器的 loadThirdPartyStream 方法。此方法会从 Ad Manager 360 请求广告事件数据，然后加载清单网址并开始播放。

在 failedWithErrorData 委托方法中，记录错误。（可选）播放备用数据流。请参阅 DAI 最佳实践。

Objective-C

ViewController.m 
- (void)adsLoader:(IMAAdsLoader *)loader adsLoadedWithData:(IMAAdsLoadedData *)adsLoadedData {
  NSLog(@"Stream created with: %@.", adsLoadedData.streamManager.streamId);
  self.streamManager = adsLoadedData.streamManager;
  self.streamManager.delegate = self;

  // Build the Pod serving Stream URL.
  NSString *streamID = adsLoadedData.streamManager.streamId;
  // Your custom VTP handler takes the stream ID and returns the stream manifest URL.
  NSString *urlString = gCustomVTPHandler(streamID);
  NSURL *streamUrl = [NSURL URLWithString:urlString];
  if (kStreamType == StreamTypeLive) {
    // Load live streams directly into the AVPlayer.
    [self.videoDisplay loadStream:streamUrl withSubtitles:@[]];
    [self.videoDisplay play];
  } else {
    // Load VOD streams using the `loadThirdPartyStream` method in IMA SDK's stream manager.
    // The stream manager loads the stream, requests metadata, and starts playback.
    [self.streamManager loadThirdPartyStream:streamUrl streamSubtitles:@[]];
  }
}

- (void)adsLoader:(IMAAdsLoader *)loader failedWithErrorData:(IMAAdLoadingErrorData *)adErrorData {
  // Log the error and play the backup content.
  NSLog(@"AdsLoader error, code:%ld, message: %@", adErrorData.adError.code,
        adErrorData.adError.message);
  [self.videoPlayer play];
}
ViewController.m

Swift

ViewController.swift 
func adsLoader(_ loader: IMAAdsLoader, adsLoadedWith adsLoadedData: IMAAdsLoadedData) {
  print("DAI stream loaded. Stream session ID: \(adsLoadedData.streamManager!.streamId!)")
  streamManager = adsLoadedData.streamManager!
  streamManager!.delegate = self

  // Build the Pod serving Stream URL.
  let streamID = streamManager!.streamId
  // Your custom VTP handler takes the stream ID and returns the stream manifest URL.
  let urlString = ViewController.customVTPParser(streamID!)
  let streamUrl = URL(string: urlString)
  if ViewController.requestType == StreamType.live {
    // Live streams can be loaded directly into the AVPlayer.
    imaVideoDisplay.loadStream(streamUrl!, withSubtitles: [])
    imaVideoDisplay.play()
  } else {
    // VOD streams are loaded using the IMA SDK's stream manager.
    // The stream manager loads the stream, requests metadata, and starts playback.
    streamManager!.loadThirdPartyStream(streamUrl!, streamSubtitles: [])
  }
}

func adsLoader(_ loader: IMAAdsLoader, failedWith adErrorData: IMAAdLoadingErrorData) {
  print("Error loading DAI stream. Error message: \(adErrorData.adError.message!)")
  // Play the backup stream.
  videoPlayer.play()
}
ViewController.swift

实现自定义 VTP 处理脚本

自定义 VTP 处理脚本会将观看者的直播 ID 以及 VTP 需要的任何其他信息发送给您的视频技术合作伙伴 (VTP)，以便 VTP 返回包含内容和接缝广告的直播清单。VTP 会提供有关如何实现自定义 VTP 处理程序的具体说明。

例如，VTP 可能包含包含宏 [[STREAMID]] 的清单模板网址。在此示例中，处理脚本会插入直播 ID 来替换宏，并返回生成的清单网址。

Objective-C

ViewController.m 
/// Custom VTP Handler.
///
/// Returns the stream manifest URL from the video technical partner or manifest manipulator.
static NSString *(^gCustomVTPHandler)(NSString *) = ^(NSString *streamID) {
  // Insert synchronous code here to retrieve a stream manifest URL from your video tech partner
  // or manifest manipulation server.
  // This example uses a hardcoded URL template, containing a placeholder for the stream
  // ID and replaces the placeholder with the stream ID.
  NSString *manifestUrl = @"YOUR_MANIFEST_URL_TEMPLATE";
  return [manifestUrl stringByReplacingOccurrencesOfString:@"[[STREAMID]]"
                                                withString:streamID];
};
ViewController.m

Swift

ViewController.swift 
/// Custom VTP Handler.
///
/// Returns the stream manifest URL from the video technical partner or manifest manipulator.
static let customVTPParser = { (streamID: String) -> (String) in
  // Insert synchronous code here to retrieve a stream manifest URL from your video tech partner
  // or manifest manipulation server.
  // This example uses a hardcoded URL template, containing a placeholder for the stream
  // ID and replaces the placeholder with the stream ID.
  let manifestURL = "YOUR_MANIFEST_URL_TEMPLATE"
  return manifestURL.replacingOccurrences(of: "[[STREAMID]]", with: streamID)
}
ViewController.swift

监听广告事件

IMAStreamManager 会调用 IMAStreamManagerDelegate 方法，以将数据流事件和错误传递给您的应用。

在此示例中，将主要广告事件记录到控制台：

Objective-C

ViewController.m 
- (void)streamManager:(IMAStreamManager *)streamManager didReceiveAdEvent:(IMAAdEvent *)event {
  NSLog(@"Ad event (%@).", event.typeString);
  switch (event.type) {
    case kIMAAdEvent_STARTED: {
      // Log extended data.
      NSString *extendedAdPodInfo = [[NSString alloc]
          initWithFormat:@"Showing ad %ld/%ld, bumper: %@, title: %@, description: %@, contentType:"
                         @"%@, pod index: %ld, time offset: %lf, max duration: %lf.",
                         (long)event.ad.adPodInfo.adPosition, (long)event.ad.adPodInfo.totalAds,
                         event.ad.adPodInfo.isBumper ? @"YES" : @"NO", event.ad.adTitle,
                         event.ad.adDescription, event.ad.contentType,
                         (long)event.ad.adPodInfo.podIndex, event.ad.adPodInfo.timeOffset,
                         event.ad.adPodInfo.maxDuration];

      NSLog(@"%@", extendedAdPodInfo);
      break;
    }
    case kIMAAdEvent_AD_BREAK_STARTED: {
      NSLog(@"Ad break started");
      break;
    }
    case kIMAAdEvent_AD_BREAK_ENDED: {
      NSLog(@"Ad break ended");
      break;
    }
    case kIMAAdEvent_AD_PERIOD_STARTED: {
      NSLog(@"Ad period started");
      break;
    }
    case kIMAAdEvent_AD_PERIOD_ENDED: {
      NSLog(@"Ad period ended");
      break;
    }
    default:
      break;
  }
}

- (void)streamManager:(IMAStreamManager *)streamManager didReceiveAdError:(IMAAdError *)error {
  NSLog(@"StreamManager error with type: %ld\ncode: %ld\nmessage: %@", error.type, error.code,
        error.message);
  [self.videoPlayer play];
}
ViewController.m

Swift

ViewController.swift 
func streamManager(_ streamManager: IMAStreamManager, didReceive event: IMAAdEvent) {
  print("Ad event \(event.typeString).")
  switch event.type {
  case IMAAdEventType.STARTED:
    // Log extended data.
    if let ad = event.ad {
      let extendedAdPodInfo = String(
        format: "Showing ad %zd/%zd, bumper: %@, title: %@, "
          + "description: %@, contentType:%@, pod index: %zd, "
          + "time offset: %lf, max duration: %lf.",
        ad.adPodInfo.adPosition,
        ad.adPodInfo.totalAds,
        ad.adPodInfo.isBumper ? "YES" : "NO",
        ad.adTitle,
        ad.adDescription,
        ad.contentType,
        ad.adPodInfo.podIndex,
        ad.adPodInfo.timeOffset,
        ad.adPodInfo.maxDuration)

      print("\(extendedAdPodInfo)")
    }
    break
  case IMAAdEventType.AD_BREAK_STARTED:
    print("Ad break started.")
    break
  case IMAAdEventType.AD_BREAK_ENDED:
    print("Ad break ended.")
    break
  case IMAAdEventType.AD_PERIOD_STARTED:
    print("Ad period started.")
    break
  case IMAAdEventType.AD_PERIOD_ENDED:
    print("Ad period ended.")
    break
  default:
    break
  }
}

func streamManager(_ streamManager: IMAStreamManager, didReceive error: IMAAdError) {
  print("StreamManager error with type: \(error.type)")
  print("code: \(error.code)")
  print("message: \(error.message ?? "Unknown Error")")
}
ViewController.swift

清理 IMA DAI 素材资源

如需停止流式传输播放、停止所有广告跟踪并释放所有已加载的流式传输资产，请调用 IMAStreamManager.destroy()。

运行您的应用，如果成功，您就可以使用 IMA SDK 请求和播放 Google DAI 广告串流。如需了解更高级的 SDK 功能，请参阅左侧边栏中列出的其他指南或 GitHub 上的示例。