iOS Development SwiftUI Framework

Question 1

What is SwiftUI's primary programming paradigm?

Accepted Answer

Declarative UI

Answer

SwiftUI uses a declarative syntax where you describe what the UI should look like for a given state, and the framework handles updates.

Question 2

Which SwiftUI property wrapper stores state local to a view?

Accepted Answer

@State

Answer

`@State` is a property wrapper that lets SwiftUI manage a value local to a view and re-render when it changes.

Question 3

What does `@Binding` do in SwiftUI?

Accepted Answer

Creates a two-way connection to a state value owned by another view

Answer

`@Binding` creates a reference to a `@State` value in another view, enabling child views to read and write that state.

Question 4

Which SwiftUI container stacks views vertically?

Accepted Answer

VStack

Answer

`VStack` arranges its children in a vertical line, stacking views from top to bottom.

Question 5

What protocol must all SwiftUI views conform to?

Accepted Answer

View

Answer

Every SwiftUI view must conform to the `View` protocol and provide a `body` property that returns some view.

iOS Development Practice Test