iOS Development UIKit Framework 2

Question 1

What is the UIKit responder chain?

Accepted Answer

The ordered sequence of objects that can handle touch or action events

Answer

The responder chain is a series of linked responder objects that pass unhandled events up the hierarchy until one handles it.

Question 2

Which UIKit class manages navigation between a stack of view controllers?

Accepted Answer

UINavigationController

Answer

UINavigationController manages a stack of view controllers and provides a navigation bar for moving between them.

Question 3

What is a storyboard in UIKit development?

Accepted Answer

A visual file that represents the UI screens and transitions of an app

Answer

A storyboard is an Interface Builder file that lets you visually design your UI scenes and the segues connecting them.

Question 4

What is a UIKit delegate?

Accepted Answer

An object that responds to events or customizes behavior on behalf of another object

Answer

The delegate pattern in UIKit allows one object to customize or respond to events of another object without subclassing.

Question 5

What does `@IBOutlet` do in a UIKit view controller?

Accepted Answer

Creates a connection between a UI element in Interface Builder and a code property

Answer

`@IBOutlet` marks a property so Interface Builder can wire it to a specific UI element, allowing code to reference it.

iOS Development Practice Test