SwiftUI Custom Views Quiz

This quiz will test your knowledge of custom SwiftUI views including declaring user interface layouts, manipulating view properties, adding custom modifiers, and understanding the hierarchical nature of SwiftUI views.

How can you extract part of a view into a subview?

By copying and pasting the code into a new file.

By assigning the code to a variable.

By creating a new struct conforming to the View protocol.

By wrapping the code in a VStack.

None

Which modifier is used to add space around a SwiftUI view?

.border()

.padding()

.spacing()

.frame()

None

How can you apply a background color to a Text view in SwiftUI?

.bgColor()

.textColor()

.background()

.backgroundColor()

None

Which of the following is true about the body property of a SwiftUI view?

It must be a computed property.

It must return a single view.

It must return a Text view.

It must conform to the Codable protocol.

None

What is the purpose of the @ViewBuilder attribute in SwiftUI?

To handle state changes within a view.

To build a complex UI with a series of views.

To modify the appearance of a view.

To create animations.

None

What is the primary purpose of using modifiers in SwiftUI?

To enhance performance.

To add more views to the hierarchy.

To handle navigation between views.

To customize the appearance and behavior of views.

None

How can you handle events when a Button in SwiftUI is clicked?

By wrapping the button in a GestureRecognizer.

By using a delegate method.

By providing an action function or closure.

By subclassing the Button view.

None

Which of the following describes the purpose of the Button view in SwiftUI?

To handle complex animations.

To render text that responds to taps.

To solicit user interaction by triggering an action when clicked.

To display an image with a click event.

None

How can you assign views to properties in SwiftUI?

By using @State to hold the view.

By using @Binding to pass the view as a parameter.

By declaring a property as a View type and assigning a view to it.

By creating a subview and referencing it with a variable.

None

10.

Which modifier would you use to make an image resizable in SwiftUI?

.padding()

.frame()

.resizable()

.aspectRatio()

None

11.

What is the purpose of using the ViewBuilder attribute in SwiftUI?

To manage memory automatically.

To create custom modifiers.

To dynamically build custom container views.

To generate complex animations.

None

12.

What is required for a structure to conform to the View protocol in SwiftUI?

It must contain a method called ‘render’.

It must inherit from UIView.

It must contain a property named ‘body’.

It must implement a ‘draw’ method.

None

13.

What is the benefit of creating subviews in SwiftUI?

Subdividing views allows for easier and faster compilation.

It promotes code reusability and better organization.

It ensures that views conform to the Codable protocol.

Subviews increase the rendering performance of SwiftUI.

None

14.

Which of the following is a valid use of concatenating Text views?

HStack { Text(“Hello, “) + Text(“how “) + Text(“are you?”) }

Text(“Hello, “) + Text(“how “) + Text(“are you?”)

VStack { Text(“Hello, “) + Text(“how “) + Text(“are you?”) }

Text(“Hello, “) + VStack { Text(“how “) } + Text(“are you?”)

None

15.

What happens when you change the order of chained modifiers on a SwiftUI view?

The appearance of the view may change based on the order.

The order does not matter, the result will be the same.

The code will not compile if the order is incorrect.

The view will automatically correct the order.

None

16.

Which SwiftUI view could be used to display both an icon and text side-by-side?

HStack

Label

VStack

Group

None

17.

How can you dynamically adapt the font size of a Text view to the user's preferred text size?

By using a fixed font size in points.

By applying the .scaleEffect() modifier.

By using a text style such as .headline or .body.

By setting a custom font size in pixels.

None

18.

Which modifier can be used to change the text size of a Text view?

.padding()

.textSize()

.font()

.fontSize()

None

19.

What happens when multiple views are declared inside the body property without using a container?

The code will not compile due to a syntax error.

SwiftUI will generate a runtime error.

Only the first declared view will be displayed.

SwiftUI will automatically wrap them inside a TupleView.

None

20.

What is the purpose of a VStack in SwiftUI?

To overlay one view on top of another.

To position views vertically within the containing view.

To position views horizontally within the containing view.

To align text within a text field.

None

21.

Which of the following is NOT a built-in SwiftUI view?

Rectangle

Text

Image

DialogBox

None

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