[iOS] IDFA 값 받아오기

1. 라이브러리 추가

• AppTrackingTransparency.framework (애플 기본 프레임워크)
• AdSupport.framework (애플 기본 프레임워크)

2. 안내 문구 추가 

info.plist

info.plist에서 tracking usage description 항목을 추가해서 사용자의 앱 트래킹을 받아오면서 안내할 안내 문구를 작성해줌.

3. 코드에서 작성

iOS 14.5 미만에서는 유저의 동의 없이 IDFA를 발급할 수 있음. 14.5 이상부터는 isAdvertisingTrackingEnabled 자체가 deprecated 되어서 ATTrackingManager를 사용하여 IDFA를 발급 받아야 함. 처음 실행될 때 받게 하려면 SceneDelegate에서 해주어야 함. \

 

func sceneDidBecomeActive(_ scene: UIScene) {
    // Called when the scene has moved from an inactive state to an active state.
    // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.

    DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
        self.requestPermission()
    }
}


// MARK: - permission
func requestPermission() {
    if #available(iOS 14, *) {
        ATTrackingManager.requestTrackingAuthorization {
            status in
                switch status {
                    case.authorized:
                        // Tracking authorization dialog was shown
                        // and we are authorized
                        print("Authorized Tracking Permission")

                    // Now that we are authorized we can get the IDFA
                    case.denied:
                        // Tracking authorization dialog was
                        // shown and permission is denied
                        print("Denied Tracking Permission")
                    case.notDetermined:
                        // Tracking authorization dialog has not been shown
                        print("Not Determined Tracking Permission")
                    case.restricted:
                        print("Restricted Tracking Permission")
                    @unknown
                    default:
                    print("Unknown Tracking Permission")
                }
        }
    } else {
        let manager = ASIdentifierManager.shared()
        guard manager.isAdvertisingTrackingEnabled
        else {
            return
        }
        print("ATT iOS 14.5 under")
        print("시뮬레이터라면 000 값이 나오게 됨")

        print(manager.advertisingIdentifier)

    }
}