[null,null,["최종 업데이트: 2025-08-25(UTC)"],[[["\u003cp\u003eThis guide explains how to implement the IDFA message within the User Messaging Platform (UMP) SDK for Flutter apps, specifically for handling Apple's App Tracking Transparency (ATT) requirements.\u003c/p\u003e\n"],["\u003cp\u003eBefore starting, ensure you have completed the UMP SDK setup and created an IDFA message in Google Ad Manager.\u003c/p\u003e\n"],["\u003cp\u003eUpdate your app's \u003ccode\u003eInfo.plist\u003c/code\u003e file to include the \u003ccode\u003eNSUserTrackingUsageDescription\u003c/code\u003e key with a custom message explaining your data usage for personalized ads, which will be displayed in the ATT dialog.\u003c/p\u003e\n"],["\u003cp\u003eLink the \u003ccode\u003eAppTrackingTransparency\u003c/code\u003e framework to enable the display of an IDFA explainer message before the ATT dialog appears.\u003c/p\u003e\n"],["\u003cp\u003eFor testing, remember the ATT dialog appears only once; reinstall the app to see it again after the initial authorization.\u003c/p\u003e\n"]]],["To support the IDFA message using the UMP SDK, first complete the \"Get started\" guide and create an IDFA message in Ad Manager. Update the `Info.plist` file by adding the `NSUserTrackingUsageDescription` key with a custom message explaining IDFA usage. Link the `AppTrackingTransparency` framework. During testing, remember the IDFA ATT dialog appears only once unless the app is uninstalled and reinstalled due to the one-time authorization request. The form is available if the authorization status is `ATTrackingManagerAuthorizationStatusNotDetermined`.\n"],null,["Select platform: [iOS](/ad-manager/mobile-ads-sdk/ios/privacy/idfa \"View this page for the iOS platform docs.\") [Flutter](/ad-manager/mobile-ads-sdk/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/admanager/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/admanager/answer/10075998#which-message-your-users-will-see) for the possible outcomes.\n\nPrerequisites\n\nBefore you begin, make sure you've done the following:\n\n- Complete the [Get started guide](/ad-manager/mobile-ads-sdk/flutter/privacy).\n- [Create an IDFA message](//support.google.com/admanager/answer/10116236) in the Ad Manager UI.\n\nUpdate Info.plist\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\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\nIf a user denies ATT, continue to request ads using your ad format's APIs. The\nGoogle Mobile Ads SDK doesn't send IDFA in the ad request. For more details see,\n[Select an ad format](/ad-manager/mobile-ads-sdk/flutter/quick-start#select_an_ad_format)."]]
