https://velog.io/@focusonmx/XIB-사용해보기-feat.체크박스
Info.Plist 란?
https://velog.io/@yohanblessyou/스토리보드의-요소가-Nib이-되는-과정-feat.-awakeFromNib
Nib파일?
https://velog.io/@yohanblessyou/스토리보드의-요소가-Nib이-되는-과정-feat.-awakeFromNib
https://velog.io/@yohanblessyou/스토리보드의-요소가-Nib이-되는-과정-feat.-awakeFromNib
https://medium.com/a-day-of-a-programmer/xib를-사용한-uiview-custom-제대로-이해하기-348a9b789496