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创建安全信号适配器

安全信号是客户端设备收集并与特定出价方共享的经过编码的数据。本页将指导您使用互动式媒体广告 (IMA) SDK 收集安全信号并将其发送到 Google Ad Manager。

准备工作

在继续之前，请确保您使用的是适用于 iOS 的 IMA SDK v3.18.5 或更高版本。

创建安全信号适配器接口

如需收集和提供安全信号，请创建实现该接口的类：

Objective-C

MySecureSignalsAdapter.h：

#import <Foundation/Foundation.h>
#import <GoogleInteractiveMediaAds/GoogleInteractiveMediaAds.h>
/** An example implementation of Secure Signals adapter. */
@interface MySecureSignalsAdapter : NSObject <IMASecureSignalsAdapter>
@end

MySecureSignalsAdapter.m：

@implementation MySecureSignalsAdapter

  /**
* Default constructor with no arguments for IMA SDK to instantiate this class.
*/
- (instancetype)init {
  self = [super init];

  return self;
}
@end

Swift

import Foundation
import GoogleInteractiveMediaAds

/** An example implementation of Secure Signals adapter. */
@objc(MySecureSignalsAdapter)
public class MySecureSignalsAdapter: IMASecureSignalsAdapter {
  /**
  * Default constructor with no arguments for IMA SDK to instantiate this class.
  */
  override init() {
    super.init()
  }
}

初始化适配器

IMA SDK 会通过调用适配器的初始化方法，对每个适配器进行一次初始化。实现此方法可开始任何加密依赖项、设置缓存或预计算所有信号收集调用中保持不变的任何信号。

以下示例会初始化适配器：

Objective-C

...
@interface MySecureSignalsAdapter
@property(nonatomic) NSError *initError;
@end
...
/**
* Initialize your SDK and any dependencies.
* IMA SDK calls this function exactly once before signal collection.
*/
- (instancetype)init {
  self = [super init];
  @try {
    // Initialize your SDK and any dependencies.
    ...
  }
  @catch(NSException *exception) {
    // Build NSError to be passed by Signal Collector.
    _initError = ...;
  }
  return self;
}
...

Swift

...
@objc(MySecureSignalsAdapter)
public class MySecureSignalsAdapter: IMASecureSignalsAdapter {
...
  private var initError

  override init() {
    super.init()

    do {
      // Initialize your SDK and any dependencies.
      ...
    } catch {
      // Build NSError to be passed by Signal Collector.
      self.initError = ...;
    }
  }
}

信号收集

在发起广告请求之前，IMA SDK 会异步调用收集信号方法。这些信号收集器方法包含一个回调函数，用于传递加密信号或报告错误。

以下示例通过回调函数收集安全信号：

Objective-C

...
/**
* Invokes your SDK to collect, encrypt and pass the signal collection results to IMA SDK.
* IMA SDK calls this function before each ad request.
*
* @param completion A callback function to pass signal collection results to IMA SDK.
*/
- (void)collectSignalsWithCompletion:(IMASignalCompletionHandler)completion {
  // Output any initialization errors
  if (self.initError) {
    completion(nil, self.initError);
    return;
  }
  @try {
    // Collect and encrypt the signals.
    NSString *signals = ...
    // Pass the encrypted signals to IMA SDK.
    completion(signals, nil);
  }
  @catch(NSException *exception) {
    NSError *collectSignalError = ...;
    // Pass signal collection failures to IMA SDK.
    completion(nil, collectSignalError);
  }
}
...

Swift

...
  /**
  * Invokes your SDK to collect, encrypt and pass the signal collection results to IMA SDK.
  * IMA SDK calls this function before each ad request.
  *
  * @param completion A callback function to pass signal collection results to IMA SDK.
  */
  public func collectSignals(completion: @escaping IMASignalCompletionHandler) {
    if (self.initError) {
      completion(nil, self.initError)
      return
    }

    do {
      // Collect and encrypt the signals.
      var signals = ...
      // Pass the encrypted signals to IMA SDK.
      completion(signals, nil)
    } catch {
      NSError collectSignalError = ...
      // Pass signal collection failures to IMA SDK.
      completion(nil, collectSignalError)
    }
  }
...

报告错误

如需与使用适配器类的用户进行通信，请报告信号收集期间的所有错误，并将其传递给信号收集器回调。此过程用于排查将适配器集成到应用期间发生的问题。

可能会出现的错误如下：

应用中未找到您的 SDK 或依赖项。
您的 SDK 或依赖项没有必要的权限或用户同意，无法正常运行。

指定适配器版本

在工作流中，请务必指定适配器的版本。IMA SDK 会在每个广告请求中包含您的适配器版本，并将其与出价请求中的安全信号一起传递。

在出价请求中，您可以根据适配器版本，识别适配器用于创建安全信号的加密、编码和格式设置详细信息。

以下示例指定了适配器版本：

Objective-C

...
/**
* Specifies this adapter's version.
*/
static NSInteger const VersionMajor = 1;
static NSInteger const VersionMinor = 0;
static NSInteger const VersionPatch = 1;
...
/**
* @return The version of this adapter.
*         IMA SDK calls this function before each ad request.
*/
+ (IMAVersion *)adapterVersion {
  // The version of the SecureSignals Adapter.
  IMAVersion *adapterVersion = [[IMAVersion alloc] init];
  adapterVersion.majorVersion = VersionMajor;
  adapterVersion.minorVersion = VersionMinor;
  adapterVersion.patchVersion = VersionPatch;
  return adapterVersion;
}
...

Swift

...
  /**
  * Specifies this adapter's version.
  */
  static let VersionMajor = 1;
  static let VersionMinor = 0;
  static let VersionPatch = 1;
...
  /**
  * @return The version of this adapter.
  *         IMA SDK calls this function before each ad request.
  */
  public static func adapterVersion() -> IMAVersion {
    let adapterVersion = IMAVersion()
    adapterVersion.majorVersion = self.VersionMajor
    adapterVersion.minorVersion = self.VersionMinor
    adapterVersion.patchVersion = self.VersionPatch
    return adapterVersion
  }
...

返回 SDK 运行时版本

您可以设计适用于多个 SDK 版本的适配器。为了让适配器能够与多个版本搭配使用，请确保您返回 SDK 的运行时版本。在每项广告请求中，IMA SDK 都会将运行时版本与适配器版本一起包含在内。

以下示例请求并返回 SDK 运行时版本：

Objective-C

...
/**
* @return The version of your SDK that this adapter is depending on.
*         IMA SDK calls this function before each ad request.
*/
+ (IMAVersion *)adSDKVersion {
  // Request the version from your SDK and convert to an IMAVersion.
  int mySDKVersion[3] = ...

  IMAVersion *adSDKVersion = [[IMAVersion alloc] init];
  adSDKVersion.majorVersion = mySDKVersion[0];
  adSDKVersion.minorVersion = mySDKVersion[1];
  adSDKVersion.patchVersion = mySDKVersion[2];

  return adSDKVersion;
}
...

Swift

...
  /**
  * @return The version of your SDK that this adapter is depending on.
  *         IMA SDK calls this function before each ad request.
  */
public static func adSDKVersion() -> IMAVersion {
    // Request the version from your SDK and convert to an IMAVersion.
    let mySDKVersion = ...

    let adSDKVersion = IMAVersion()
    adSDKVersion.majorVersion = mySDKVersion[0]
    adSDKVersion.minorVersion = mySDKVersion[1]
    adSDKVersion.patchVersion = mySDKVersion[2]
    return adSDKVersion
  }
...

向 Google 注册适配器

为了让 Google 授权适配器收集信号，您必须向 Google 注册 iOS 类名称。IMA SDK 仅初始化您向 Google 注册的适配器。

验证适配器

如需验证适配器，请完成以下部分：

配置测试应用

在验证适配器之前，请配置测试应用。请完成以下步骤：

将 IMA SDK 添加到您的 pod 文件中：

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '10'
target "BasicExample" do
  pod 'GoogleAds-IMA-iOS-SDK', '~> 3.17.0'
end

使用 CocoaPods 安装 IMA SDK。如需了解如何通过 CocoaPods 安装 IMA SDK，请参阅使用入门。
在 XCode 项目中，添加适配器、SDK 以及您添加的所有其他 build 依赖项。

验证信号

如需验证安全信号的长度、加密值、适配器版本和 SDK 版本，请与支持团队联系，分享捕获的流量日志。

查看完整示例

本部分包含完成所有步骤的示例，供您参考。

Objective-C

MySecureSignalsAdapter.h：

#import <Foundation/Foundation.h>
#import <GoogleInteractiveMediaAds/GoogleInteractiveMediaAds.h>

/** An example implementation of Secure Signals adapter. */
@interface MySecureSignalsAdapter : NSObject <IMASecureSignalsAdapter>
@end

MySecureSignalsAdapter.m：

#import "path/to/MyExampleSecureSignalsAdapter.h"

@interface MySecureSignalsAdapter
@property(nonatomic) NSError *initError;
@end

static NSInteger const VersionMajor = 1;
static NSInteger const VersionMinor = 0;
static NSInteger const VersionPatch = 1;

@implementation MySecureSignalsAdapter
/**
* Initialize your SDK and any dependencies.
* IMA SDK calls this function exactly once before signal collection.
*/
- (instancetype)init {
  self = [super init];
  @try {
    // Initialize your SDK and any dependencies.
    ...
  }
  @catch(NSException *exception) {
    // Build NSError to be passed by Signal Collector.
    _initError = ...;
  }
  return self;
}
/**
* Invokes your SDK to collect, encrypt and pass the signal collection results to IMA SDK.
* IMA SDK calls this function before each ad request.
*
* @param completion A callback function to pass signal collection results to IMA SDK.
*/
- (void)collectSignalsWithCompletion:(IMASignalCompletionHandler)completion {
  if (self.initError) {
    completion(nil, self.initError);
    return;
  }
  @try {
    // Collect and encrypt the signals.
    NSString *signals = ...
    // Pass the encrypted signals to IMA SDK.
    completion(signals, nil);
  }
  @catch(NSException *exception) {
    NSError *collectSignalError = ...;
    // Pass signal collection failures to IMA SDK.
    completion(nil, collectSignalError);
  }
}
/**
* @return The version of this adapter.
*         IMA SDK calls this function before each ad request.
*/
+ (IMAVersion *)adapterVersion {
  // The version of the SecureSignals Adapter.
  IMAVersion *adapterVersion = [[IMAVersion alloc] init];
  adapterVersion.majorVersion = VersionMajor;
  adapterVersion.minorVersion = VersionMinor;
  adapterVersion.patchVersion = VersionPatch;
  return adapterVersion;
}

/**
  * @return The version of your SDK that this adapter depends on.
  *         IMA SDK calls this function before each ad request.
  */
+ (IMAVersion *)adSDKVersion {
  // Request the version from your SDK and convert to an IMAVersion.
  int mySDKVersion[3] = ...

  IMAVersion *adSDKVersion = [[IMAVersion alloc] init];
  adSDKVersion.majorVersion = mySDKVersion[0];
  adSDKVersion.minorVersion = mySDKVersion[1];
  adSDKVersion.patchVersion = mySDKVersion[2];

  return adSDKVersion;
}

@end

Swift

@objc(MySecureSignalsAdapter)
public class MySecureSignalsAdapter: IMASecureSignalsAdapter {
  static let VersionMajor = 1;
  static let VersionMinor = 0;
  static let VersionPatch = 1;

  private var initError

  override init() {
    super.init()

    do {
      // Initialize your SDK and any dependencies.
      ...
    } catch {
      // Build NSError to be passed by Signal Collector.
      self.initError = ...;
    }
  }

  public func collectSignals(completion: @escaping IMASignalCompletionHandler) {
    if (self.initError) {
      completion(nil, self.initError)
      return
    }

    do {
      // Collect and encrypt the signals.
      var signals = ...
      // Pass the encrypted signals to IMA SDK.
      completion(signals, nil)
    } catch {
      NSError collectSignalError = ...
      // Pass signal collection failures to IMA SDK.
      completion(nil, collectSignalError)
    }      
  }

  public static func adapterVersion() -> IMAVersion {
    let adapterVersion = IMAVersion()
    adapterVersion.majorVersion = self.VersionMajor
    adapterVersion.minorVersion = self.VersionMinor
    adapterVersion.patchVersion = self.VersionPatch
    return adapterVersion
  }

  public static func adSDKVersion() -> IMAVersion {
    // Request the version from your SDK and convert to an IMAVersion.
    let mySDKVersion = ...

    let adSDKVersion = IMAVersion()
    adSDKVersion.majorVersion = mySDKVersion[0]
    adSDKVersion.minorVersion = mySDKVersion[1]
    adSDKVersion.patchVersion = mySDKVersion[2]
    return adSDKVersion
  }
}