uikit1

1. UILabel

• https://developer.apple.com/documentation/uikit/uilabel

2. UIButton

• https://developer.apple.com/documentation/uikit/uibutton

3. UITextField

• https://developer.apple.com/documentation/uikit/uitextfield

4. UIAlertViewController

• https://developer.apple.com/documentation/uikit/uialertcontroller

5. UISwitch

• https://developer.apple.com/reference/uikit/uiswitch

6. UISegmentedControl

• https://developer.apple.com/reference/uikit/uisegmentedcontrol

7. UISlider

• https://developer.apple.com/reference/uikit/uislider

8. UIActivityIndicatorView

• https://developer.apple.com/reference/uikit/uiactivityindicatorview

9. UIProgressView

• https://developer.apple.com/reference/uikit/uiprogressview

10. AutoLayout

• https://www.raywenderlich.com/443-auto-layout-tutorial-in-ios-11-getting-started
• https://developer.apple.com/library/archive/documentation/UserExperience/Conceptual/AutolayoutPG/