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设置全方位服务 DAI

请选择平台： HTML5 Android iOS tvOS Cast Roku

本指南介绍了如何将 IMA DAI SDK 集成到视频播放器应用中。如果您想查看或按照完整的集成示例进行操作，请从 GitHub 下载 BasicExample。

IMA DAI 概览

如本指南所示，实现 IMA DAI 涉及三个主要 SDK 组件：

IMAAdDisplayContainer：一个容器对象，位于视频播放元素之上，用于容纳广告界面元素。
IMAAdsLoader：一个对象，用于请求视频流并处理由视频流请求响应对象触发的事件。您应该只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 - IMAVODStreamRequest 或 IMALiveStreamRequest：用于定义直播请求的对象。视频流请求可以针对视频点播或直播。直播请求会指定素材资源键，而 VOD 请求会指定 CMS ID 和视频 ID。这两种请求类型都可以选择包含访问指定视频流所需的 API 密钥，以及供 IMA SDK 按照 Google Ad Manager 设置中的指定方式处理广告标识符的 Google Ad Manager 广告资源网代码。
IMAStreamManager：用于处理动态广告插播视频流以及与 DAI 后端进行互动的对象。直播管理工具还会处理跟踪 ping，并将直播和广告事件转发给发布商。

前提条件

在开始之前，您需要做好以下准备：

Xcode 13 或更高版本
IMA SDK 的安装方法：
- Swift Package Manager（首选）
- IMA SDK for tvOS 的下载副本

创建新的 Xcode 项目

在 Xcode 中，使用 Objective-C 创建一个新的 tvOS 项目。使用 BasicExample 作为项目名称。

将 IMA DAI SDK 添加到 Xcode 项目中

如需安装 IMA SDK，请选择首选方法。

手动下载并安装 SDK

如果您不想使用 Swift Package Manager，请下载 IMA SDK 并手动将其添加到项目中。

显示说明

从下载页面下载并解压缩最新版本的 IMA DAI SDK。
打开 BasicExample.xcodeproj。
在左侧窗格中，点击项目名称。
在中间窗格中，点击 Build Phases。
展开 Link Binary With Libraries 部分。
在库列表底部，点击加号图标 [+]。
点击添加“其他”。
在您解压下载的 SDK 的目录中，选择 GoogleInteractiveMediaAds.framework，然后点击打开。
在库列表底部，再次点击加号图标 [+]。
在状态列中，验证 GoogleInteractiveMediaAds.framework 为 Required。
在 build 设置中添加 -ObjC 链接器标志。如需了解详情，请参阅 Apple QA1490。

导入 IMA SDK

使用 import 语句添加 IMA 框架：

Objective-C

#import "ViewController.h"
#import <AVKit/AVKit.h>

@import GoogleInteractiveMediaAds;ViewController.m

Swift

import AVFoundation
import GoogleInteractiveMediaAds
import UIKit
ViewController.swift

创建视频播放器并集成 IMA SDK

以下示例会初始化 IMA SDK：

Objective-C

// Live stream asset key, VOD content source and video IDs, and backup content URL.
static NSString *const kAssetKey = @"c-rArva4ShKVIAkNfy6HUQ";
static NSString *const kContentSourceID = @"2548831";
static NSString *const kVideoID = @"tears-of-steel";
static NSString *const kNetworkCode = @"21775744923";
static NSString *const kBackupStreamURLString =
    @"http://googleimadev-vh.akamaihd.net/i/big_buck_bunny/bbb-,480p,720p,1080p,.mov.csmil/"
    @"master.m3u8";
static const StreamType kDefaultStreamType = StreamTypeLive;

@interface ViewController () <IMAAdsLoaderDelegate,
                              IMAStreamManagerDelegate,
                              AVPlayerViewControllerDelegate>
@property(nonatomic) IMAAdsLoader *adsLoader;
@property(nonatomic) IMAAdDisplayContainer *adDisplayContainer;
@property(nonatomic) UIView *adContainerView;
@property(nonatomic) id<IMAVideoDisplay> videoDisplay;
@property(nonatomic) IMAStreamManager *streamManager;
@property(nonatomic) AVPlayerViewController *playerViewController;
@property(nonatomic, getter=isAdBreakActive) BOOL adBreakActive;
@end

@implementation ViewController

- (void)viewDidLoad {
  [super viewDidLoad];
  self.view.backgroundColor = [UIColor blackColor];
  self.streamType = kDefaultStreamType;
  [self setupAdsLoader];
  [self setupPlayer];
  [self setupAdContainer];
}

- (void)viewDidAppear:(BOOL)animated {
  [super viewDidAppear:animated];
  [self requestStream];
}

- (void)setupPlayer {
  // Create a stream video player.
  AVPlayer *player = [[AVPlayer alloc] init];
  self.playerViewController = [[AVPlayerViewController alloc] init];
  self.playerViewController.player = player;

  // Attach video player to view hierarchy.
  [self addChildViewController:self.playerViewController];
  [self.view addSubview:self.playerViewController.view];
  self.playerViewController.view.frame = self.view.bounds;
  [self.playerViewController didMoveToParentViewController:self];
}ViewController.m

Swift

class ViewController:
  UIViewController,
  IMAAdsLoaderDelegate,
  IMAStreamManagerDelegate,
  AVPlayerViewControllerDelegate
{
  // Live stream asset key, VOD content source and video IDs, Google Ad Manager network code, and
  // backup content URL.
  static let assetKey = "c-rArva4ShKVIAkNfy6HUQ"
  static let contentSourceID = "2548831"
  static let videoID = "tears-of-steel"
  static let networkCode = "21775744923"
  static let backupStreamURLString =
    "http://googleimadev-vh.akamaihd.net/i/big_buck_bunny/bbb-,480p,720p,1080p,.mov.csmil/master.m3u8"

  var adsLoader: IMAAdsLoader?
  var videoDisplay: IMAAVPlayerVideoDisplay!
  var adDisplayContainer: IMAAdDisplayContainer?
  var adContainerView: UIView?
  private var streamManager: IMAStreamManager?
  private var contentPlayhead: IMAAVPlayerContentPlayhead?
  private var playerViewController: AVPlayerViewController!
  private var userSeekTime = 0.0
  private var adBreakActive = false

  private enum StreamType {
    case live
    /// Video on demand.
    case vod
  }

  /// Set the stream type here.
  private let currentStreamType: StreamType = .live

  deinit {
    NotificationCenter.default.removeObserver(self)
  }

  override func viewDidLoad() {
    super.viewDidLoad()
    self.view.backgroundColor = UIColor.black

    setupAdsLoader()
    setupPlayer()
    setupAdContainer()
  }

  override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    requestStream()
  }

  func setupPlayer() {
    let player = AVPlayer()
    let playerViewController = AVPlayerViewController()
    playerViewController.delegate = self
    playerViewController.player = player

    // Set up our content playhead and contentComplete callback.
    contentPlayhead = IMAAVPlayerContentPlayhead(avPlayer: player)
    NotificationCenter.default.addObserver(
      self,
      selector: #selector(ViewController.contentDidFinishPlaying(_:)),
      name: NSNotification.Name.AVPlayerItemDidPlayToEndTime,
      object: player.currentItem)

    self.addChild(playerViewController)
    playerViewController.view.frame = self.view.bounds
    self.view.insertSubview(playerViewController.view, at: 0)
    playerViewController.didMove(toParent: self)
    self.playerViewController = playerViewController
  }ViewController.swift

在 viewDidLoad() 中，setupAdsLoader() 会创建 IMAAdsLoader，setupPlayer() 会创建 AVPlayerViewController，setupAdContainer() 会准备 UIView 以便展示广告。当视图变为可见时，viewDidAppear() 会调用 requestStream() 来请求 DAI 视频流。

为了定义直播请求参数，此示例使用了常量，例如 asset key（对于直播）或 content source ID 和 video ID（对于 VOD 直播）。该示例还使用以下组件来管理 IMA SDK：

adsLoader：处理向 Google Ad Manager 发出的直播请求。我们建议在应用的生命周期内使用单个实例。
videoDisplay：一种 IMAVideoDisplay 实现，可让 IMA 使用 AVPlayer 控制视频播放和跟踪播放事件。
adDisplayContainer：管理用于呈现广告界面元素和在广告插播时间点处理界面焦点的视图。
streamManager：管理组合广告和内容流的播放，并使用其委托发送广告生命周期事件。
playerViewController：用于呈现由 IMA SDK 管理的视频流的 tvOS 播放器。
adBreakActive：一个布尔值标志，用于指示广告插播时间点是否正在播放，以防止用户快进广告并管理界面焦点。

实现 IMAAdsLoader

接下来，实例化 IMAAdsLoader 并将广告容器视图附加到视图层次结构。

Objective-C

- (void)setupAdsLoader {
  self.adsLoader = [[IMAAdsLoader alloc] init];
  self.adsLoader.delegate = self;
}

- (void)setupAdContainer {
  // Attach the ad container to the view hierarchy on top of the player.
  self.adContainerView = [[UIView alloc] init];
  [self.view addSubview:self.adContainerView];
  self.adContainerView.frame = self.view.bounds;
  // Keep hidden initially, until an ad break.
  self.adContainerView.hidden = YES;
}ViewController.m

Swift

func setupAdsLoader() {
  let adsLoader = IMAAdsLoader(settings: nil)
  adsLoader.delegate = self
  self.adsLoader = adsLoader
}

func setupAdContainer() {
  // Attach the ad container to the view hierarchy on top of the player.
  let adContainerView = UIView()
  self.view.addSubview(adContainerView)
  adContainerView.frame = self.view.bounds
  // Keep hidden initially, until an ad break.
  adContainerView.isHidden = true
  self.adContainerView = adContainerView
}ViewController.swift

发出流式传输请求

创建一些常量来保存直播信息，然后实现直播请求函数以发出请求。

Objective-C

- (void)requestStream {
  self.videoDisplay =
      [[IMAAVPlayerVideoDisplay alloc] initWithAVPlayer:self.playerViewController.player];
  self.adDisplayContainer = [[IMAAdDisplayContainer alloc] initWithAdContainer:self.adContainerView
                                                                viewController:self];

  // Use the streamType property to determine which request to create.
  switch (self.streamType) {
    case StreamTypeLive: {
      IMALiveStreamRequest *request =
          [[IMALiveStreamRequest alloc] initWithAssetKey:kAssetKey
                                             networkCode:kNetworkCode
                                      adDisplayContainer:self.adDisplayContainer
                                            videoDisplay:self.videoDisplay
                                             userContext:nil];
      NSLog(@"IMA: Requesting Live Stream with Asset Key: %@.", kAssetKey);
      request.useHLSInterstitials = YES;
      [self.adsLoader requestStreamWithRequest:request];
      break;
    }
    case StreamTypeVOD: {
      IMAVODStreamRequest *request =
          [[IMAVODStreamRequest alloc] initWithContentSourceID:kContentSourceID
                                                       videoID:kVideoID
                                                   networkCode:kNetworkCode
                                            adDisplayContainer:self.adDisplayContainer
                                                  videoDisplay:self.videoDisplay
                                                   userContext:nil];
      NSLog(@"IMA: Requesting VOD Stream with Video ID: %@.", kVideoID);
      [self.adsLoader requestStreamWithRequest:request];
      break;
    }
  }
}ViewController.m

Swift

func requestStream() {
  guard let playerViewController = self.playerViewController else { return }
  guard let adContainerView = self.adContainerView else { return }
  guard let adsLoader = self.adsLoader else { return }

  self.videoDisplay = IMAAVPlayerVideoDisplay(avPlayer: playerViewController.player!)
  let adDisplayContainer = IMAAdDisplayContainer(
    adContainer: adContainerView, viewController: self)
  self.adDisplayContainer = adDisplayContainer

  switch self.currentStreamType {
  case .live:
    // Create a live stream request.
    let request = IMALiveStreamRequest(
      assetKey: ViewController.assetKey,
      networkCode: ViewController.networkCode,
      adDisplayContainer: adDisplayContainer,
      videoDisplay: self.videoDisplay,
      pictureInPictureProxy: nil,
      userContext: nil)
    print("IMA: Requesting Live Stream with asset key \(ViewController.assetKey)")
    request.useHLSInterstitials = true
    adsLoader.requestStream(with: request)

  case .vod:
    // Create a VOD stream request.
    let request = IMAVODStreamRequest(
      contentSourceID: ViewController.contentSourceID,
      videoID: ViewController.videoID,
      networkCode: ViewController.networkCode,
      adDisplayContainer: adDisplayContainer,
      videoDisplay: self.videoDisplay,
      pictureInPictureProxy: nil,
      userContext: nil)
    print(
      "IMA: Requesting VOD Stream with content source ID \(ViewController.contentSourceID) and "
        + "video ID \(ViewController.videoID)")
    adsLoader.requestStream(with: request)
  }
}ViewController.swift

处理直播活动

IMAAdsLoader 和 IMAStreamManager 会触发事件，以处理初始化、错误和数据流状态变化。这些事件通过 IMAAdsLoaderDelegate 和 IMAStreamManagerDelegate 协议触发。监听广告加载事件并初始化直播。如果广告加载失败，则改为播放备用直播。

Objective-C

- (void)playBackupStream {
  NSURL *backupStreamURL = [NSURL URLWithString:kBackupStreamURLString];
  [self.videoDisplay loadStream:backupStreamURL withSubtitles:@[]];
  [self.videoDisplay play];
  [self startMediaSession];
}

- (void)startMediaSession {
  [[AVAudioSession sharedInstance] setActive:YES error:nil];
  [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
}

#pragma mark - IMAAdsLoaderDelegate

- (void)adsLoader:(IMAAdsLoader *)loader adsLoadedWithData:(IMAAdsLoadedData *)adsLoadedData {
  // Initialize and listen to stream manager's events.
  self.streamManager = adsLoadedData.streamManager;
  self.streamManager.delegate = self;
  [self.streamManager initializeWithAdsRenderingSettings:nil];
  NSLog(@"Stream created with: %@.", self.streamManager.streamId);
}

- (void)adsLoader:(IMAAdsLoader *)loader failedWithErrorData:(IMAAdLoadingErrorData *)adErrorData {
  // Fall back to playing the backup stream.
  NSLog(@"Error loading ads: %@", adErrorData.adError.message);
  [self playBackupStream];
}ViewController.m

Swift

@objc func contentDidFinishPlaying(_ notification: Notification) {
  guard let adsLoader = self.adsLoader else { return }
  adsLoader.contentComplete()
}

func startMediaSession() {
  try? AVAudioSession.sharedInstance().setActive(true, options: [])
  try? AVAudioSession.sharedInstance().setCategory(.playback)
}

// MARK: - IMAAdsLoaderDelegate

func adsLoader(_ loader: IMAAdsLoader, adsLoadedWith adsLoadedData: IMAAdsLoadedData) {
  let streamManager = adsLoadedData.streamManager!
  streamManager.delegate = self
  streamManager.initialize(with: nil)
  self.streamManager = streamManager
}

func adsLoader(_ loader: IMAAdsLoader, failedWith adErrorData: IMAAdLoadingErrorData) {
  print("Error loading ads: \(adErrorData.adError.message)")
  let streamUrl = URL(string: ViewController.backupStreamURLString)
  self.videoDisplay.loadStream(streamUrl!, withSubtitles: [])
  self.videoDisplay.play()
  playerViewController.player?.play()
}ViewController.swift

处理日志记录和错误事件

视频流管理器委托可以处理多个事件，但对于基本实现，最重要的用途是执行事件日志记录、防止在广告播放时执行跳转操作以及处理错误。

Objective-C

#pragma mark - IMAStreamManagerDelegate

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

      NSLog(@"%@", extendedAdPodInfo);
      break;
    }
    case kIMAAdEvent_AD_BREAK_STARTED: {
      self.adContainerView.hidden = NO;
      // Trigger an update to send focus to the ad display container.
      self.adBreakActive = YES;
      [self setNeedsFocusUpdate];
      break;
    }
    case kIMAAdEvent_AD_BREAK_ENDED: {
      self.adContainerView.hidden = YES;
      // Trigger an update to send focus to the content player.
      self.adBreakActive = NO;
      [self setNeedsFocusUpdate];
      break;
    }
    case kIMAAdEvent_ICON_FALLBACK_IMAGE_CLOSED: {
      // Resume playback after the user has closed the dialog.
      [self.videoDisplay play];
      break;
    }
    default:
      break;
  }
}

- (void)streamManager:(IMAStreamManager *)streamManager didReceiveAdError:(IMAAdError *)error {
  // Fall back to playing the backup stream.
  NSLog(@"StreamManager error: %@", error.message);
  [self playBackupStream];
}ViewController.m

Swift

// MARK: - IMAStreamManagerDelegate
func streamManager(_ streamManager: IMAStreamManager, didReceive event: IMAAdEvent) {
  print("StreamManager event \(event.typeString).")
  switch event.type {
  case IMAAdEventType.STREAM_STARTED:
    self.startMediaSession()
  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:
    if let adContainerView = self.adContainerView {
      adContainerView.isHidden = false
    }
    // Trigger an update to send focus to the ad display container.
    adBreakActive = true
    setNeedsFocusUpdate()
    break
  case IMAAdEventType.AD_BREAK_ENDED:
    if let adContainerView = self.adContainerView {
      adContainerView.isHidden = true
    }
    // Trigger an update to send focus to the content player.
    adBreakActive = false
    setNeedsFocusUpdate()
    break
  case IMAAdEventType.ICON_FALLBACK_IMAGE_CLOSED:
    // Resume playback after the user has closed the dialog.
    self.videoDisplay.play()
    break
  default:
    break
  }
}

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

大功告成！现在，您可以使用 IMA DAI SDK 请求和展示广告了。如需了解更高级的 SDK 功能，请参阅其他指南或 GitHub 上的示例。

设置全方位服务 DAI 使用集合让一切井井有条 根据您的偏好保存内容并对其进行分类。

IMA DAI 概览

前提条件

创建新的 Xcode 项目

将 IMA DAI SDK 添加到 Xcode 项目中

推荐：使用 Swift Package Manager 安装 SDK

手动下载并安装 SDK

显示说明

导入 IMA SDK

Objective-C

Swift

创建视频播放器并集成 IMA SDK

Objective-C

Swift

实现 IMAAdsLoader

Objective-C

Swift

发出流式传输请求

Objective-C

Swift

处理直播活动

Objective-C

Swift

处理日志记录和错误事件

Objective-C

Swift

设置全方位服务 DAI