SwiftUI SwiftUI Gestures and Interactions 2

Question 1

Which gesture type in SwiftUI is used to detect pinching motions for zooming?

Accepted Answer

MagnificationGesture

Answer

MagnificationGesture recognizes pinch-to-zoom interactions and provides a magnification value.

Question 2

What is the purpose of the `@GestureState` property wrapper in SwiftUI?

Accepted Answer

To store transient gesture values that reset when the gesture ends

Answer

@GestureState automatically resets to its initial value when the gesture ends, making it ideal for transient interaction state.

Question 3

How do you chain two gestures so that the second gesture only starts after the first succeeds?

Accepted Answer

firstGesture.sequenced(before: secondGesture)

Answer

The .sequenced(before:) method creates a gesture that requires the first gesture to complete before recognizing the second.

Question 4

Which property of RotationGesture.Value gives the angle of rotation?

Accepted Answer

rotation

Answer

The rotation property of RotationGesture.Value returns an Angle struct representing how far the gesture has rotated.

Question 5

When using DragGesture, which method is called to handle ongoing movement during the drag?

Accepted Answer

.onChanged { }

Answer

.onChanged { } is the gesture callback that fires continuously as the drag position updates.

SwiftUI Practice Test