SwiftUI SwiftUI Views and Layout 2

Question 1

Which container view in SwiftUI creates a scrollable list of items?

Accepted Answer

ScrollView

Answer

ScrollView provides a scrolling container for its child content.

Question 2

What does the `.padding()` modifier do when called with no arguments?

Accepted Answer

Adds system-default padding on all sides

Answer

Calling `.padding()` with no arguments applies the system default padding amount on all four sides.

Question 3

Which view type should you use for a horizontally scrollable row of cards?

Accepted Answer

ScrollView(.horizontal) with HStack

Answer

A horizontal ScrollView containing an HStack is the standard pattern for horizontally scrollable content.

Question 4

What is the role of `GeometryReader` in SwiftUI?

Accepted Answer

It provides the parent view's size and coordinate space

Answer

GeometryReader exposes a GeometryProxy that gives the view access to its parent container's size and coordinate space.

Question 5

Which alignment option centers content both horizontally and vertically in a ZStack?

Accepted Answer

.center

Answer

ZStack's default alignment is `.center`, which centers children both horizontally and vertically.

SwiftUI Practice Test