스크롤뷰에 뷰 임베드하기
https://seizze.github.io/2019/11/17/iOS에서-키보드에-동적인-스크롤뷰-만들기.html
https://jmkim.tistory.com/100
https://velog.io/@inwoodev/Swift-ScrollView-코드로화면에-적용하기
스크롤뷰에서 touchesBegan 호출 안될 때
https://zeddios.tistory.com/309
스크롤뷰 + 키보드 떴을 때 스크롤 하기
https://stackoverflow.com/questions/13161666/how-do-i-scroll-the-uiscrollview-when-the-keyboard-appears
navigationbar 색깔 변경
https://zeddios.tistory.com/574
viewDidLayoutSubviews
https://www.appcoda.com/view-controller-lifecycle/
앨범 권한 설정
https://poky-develop.tistory.com/20
constraint 설정 시점
https://stackoverflow.com/questions/26349234/getting-exception-impossible-to-set-up-layout-with-view-hierarchy-unprepared-f
UIAlertController 크기 바꾸기
https://stackoverflow.com/questions/26774038/how-to-set-height-and-width-of-a-uialertcontroller-in-ios-8/58387922#58387922
