IDFA 支持(仅限 iOS)
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。
借助 User Messaging Platform (UMP) SDK,您可以在请求用户同意应用跟踪透明度 (ATT) 之前向用户显示 IDFA 消息。IDFA 消息会向用户说明您的应用如何使用该标识符。
本指南介绍了如何使用 UMP SDK 显示 IDFA 消息。
前提条件
在开始之前,请确保您已完成以下操作:
更新 Info.plist
如需显示自定义提醒消息,请执行以下操作:
- 打开
Info.plist
文件。
- 添加
NSUserTrackingUsageDescription
键,并附上说明使用情况的自定义消息:
<key>NSUserTrackingUsageDescription</key>
<string>This identifier will be used to deliver personalized ads to you.</string>
显示用户意见征求表单时,该使用情况说明会作为 IDFA ATT 提醒的一部分向用户显示:

然后,关联 AppTrackingTransparency
框架:

然后,您的应用会在 ATT 提醒之前显示 IDFA 消息。
测试
进行测试时请注意,requestTrackingAuthorization
是一次性请求,因此 ATT 提醒只显示一次。UMP SDK 仅在授权状态为 ATTrackingManagerAuthorizationStatusNotDetermined
时提供可加载的表单。
如需使“提醒”再次显示,您必须在测试设备上卸载您的应用后重新安装。
请求广告(无论是否带有 IDFA)
如果用户拒绝 ATT,请继续使用广告格式的 API 请求广告。
Google 移动广告 SDK
不会在广告请求中发送 IDFA。如需了解详情,请参阅选择广告格式。
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-08-25。
[null,null,["最后更新时间 (UTC):2025-08-25。"],[[["\u003cp\u003eThis guide provides steps to integrate the IDFA message within the User Messaging Platform (UMP) SDK for iOS apps, specifically focusing on Apple's App Tracking Transparency (ATT) framework.\u003c/p\u003e\n"],["\u003cp\u003eBefore proceeding, ensure you have completed the UMP SDK setup and created an IDFA message in AdMob.\u003c/p\u003e\n"],["\u003cp\u003eUpdate your app's \u003ccode\u003eInfo.plist\u003c/code\u003e file by adding the \u003ccode\u003eNSUserTrackingUsageDescription\u003c/code\u003e key with a clear explanation of how you will use the IDFA, and link the \u003ccode\u003eAppTrackingTransparency\u003c/code\u003e framework for the UMP SDK to manage the ATT dialog.\u003c/p\u003e\n"],["\u003cp\u003eDuring testing, note that the IDFA ATT dialog appears only once per app installation; to retest, uninstall and reinstall the app on your device.\u003c/p\u003e\n"]]],["To support the IDFA message with the UMP SDK, create and publish an IDFA explainer message in the AdMob UI. Update the `Info.plist` file by adding the `NSUserTrackingUsageDescription` key with a custom message. Link the `AppTrackingTransparency` framework. Remember, the IDFA ATT dialog appears only once unless the app is reinstalled. The UMP SDK can load a form only if the authorization status is `ATTrackingManagerAuthorizationStatusNotDetermined`.\n"],null,["# IDFA support (iOS only)\n\nSelect platform: [iOS](/admob/ios/privacy/idfa \"View this page for the iOS platform docs.\") [Flutter](/admob/flutter/privacy/idfa \"View this page for the Flutter platform docs.\")\n\n\u003cbr /\u003e\n\nThe User Messaging Platform (UMP) SDK lets you present an\n\n[IDFA message](//support.google.com/admob/answer/10115027)\n\nto your users before requesting their consent for\n[App Tracking Transparency](//developer.apple.com/documentation/apptrackingtransparency)\n(ATT). The IDFA message shows your users how your app uses the identifier.\n\nThis guide covers using the UMP SDK to present an IDFA message.\n| **Note:** If you enable both GDPR and IDFA messages, refer to [Which message your users will\n| see](//support.google.com/admob/answer/10114020#which-message-your-users-will-see) for the possible outcomes.\n\nPrerequisites\n-------------\n\nBefore you begin, make sure you've done the following:\n\n- Complete the [Get started guide](/admob/flutter/privacy).\n- [Create an IDFA message](//support.google.com/admob/answer/10115331) in the AdMob UI.\n\nUpdate Info.plist\n-----------------\n\nTo show a custom alert message, do the following:\n\n1. Open the `Info.plist` file.\n2. Add the `NSUserTrackingUsageDescription` key with a custom message that describes the usage:\n\n \u003ckey\u003eNSUserTrackingUsageDescription\u003c/key\u003e\n \u003cstring\u003eThis identifier will be used to deliver personalized ads to you.\u003c/string\u003e\n\nThe usage description appears as part of the IDFA ATT alert when you present the\nconsent form:\n\nThen, link the `AppTrackingTransparency` framework:\n\nYour app then shows an IDFA message before the ATT alert.\n\nTesting\n-------\n\nWhile testing, remember that the ATT alert only appears a single time since\n[`requestTrackingAuthorization`](//developer.apple.com/documentation/apptrackingtransparency/attrackingmanager/3547037-requesttrackingauthorization)\nis a one-time request. The UMP SDK only has a form available to load if the\nauthorization status is\n[`ATTrackingManagerAuthorizationStatusNotDetermined`](//developer.apple.com/documentation/apptrackingtransparency/attrackingmanagerauthorizationstatus/attrackingmanagerauthorizationstatusnotdetermined?language=objc).\n\nTo make the alert appear a second time, you must uninstall and reinstall your\napp on your test device.\n\nRequest ads with or without IDFA\n--------------------------------\n\nIf a user denies ATT, continue to request ads using your ad format's APIs. The\n\n\nGoogle Mobile Ads SDK\n\ndoesn't send IDFA in the ad request. For more details see,\n[Select an ad format](/admob/flutter/quick-start#select_an_ad_format)."]]