Apple Developer Documentation

Hello world

1. 'click' view controller embed in 'tab bar controller'
2. ViewController 추가, UIViewController.swift추가 및 custom class연결
3. tabbar → control drag, relation segue-view controller
4. module → tabbar

LifeCycle

• 메인 탭, 그리고 처음 탭을 클릭시 최초로 viewDidLoad()가 딱 한번 불림
• 한 번 불렸던 탭들은 다시 선택될 때, 다음과 같이 컨트롤러가 동작한다.
  • 나타날꺼야!!!!
  • 사라질꺼야!!!!
  • 사라졌다!
  • 나타났다!

Custom

&ref

[공식문서] https://developer.apple.com/documentation/uikit/uitabbarcontroller

https://stackoverflow.com/questions/26850411/how-add-tabs-programmatically-in-uitabbarcontroller-with-swift

https://o-o-wl.tistory.com/42

[hello world - storyboard] https://bite-sized-learning.tistory.com/188

[hello world - programmatically] https://hururuek-chapchap.tistory.com/168

https://medium.com/sprinthub/creating-a-customized-tab-bar-in-ios-with-swift-41ed380f2a30