https://velog.io/@khy226/swift-앱-추적-권한-띄우기

https://ios-development.tistory.com/462

https://www.androidhuman.com/2021-04-28-ios_att_explainer

https://chelsea-kbj.tistory.com/59

https://velog.io/@minji0801/iOS-Swift-앱-추적-권한-Alert-띄우기