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# MagnifyGesture

A gesture that recognizes a magnification motion and tracks the amount of
magnification.

```
nonisolated struct MagnifyGesture
```

## Overview

A magnify gesture tracks how a magnification event sequence changes.
To recognize a magnify gesture on a view, create and configure the
gesture, and then add it to the view using the
[`gesture(_:including:)`](/documentation/SwiftUI/View/gesture(_:including:)) modifier.

Add a magnify gesture to a [`Circle`](/documentation/SwiftUI/Circle) that changes its size while the
user performs the gesture:

```
struct MagnifyGestureView: View {
    @GestureState private var magnifyBy = 1.0

    var magnification: some Gesture {
        MagnifyGesture()
            .updating($magnifyBy) { value, gestureState, transaction in
                gestureState = value.magnification
            }
    }

    var body: some View {
        Circle()
            .frame(width: 100, height: 100)
            .scaleEffect(magnifyBy)
            .gesture(magnification)
    }
}
```

## Topics

### Creating the gesture

[`init(minimumScaleDelta:)`](/documentation/SwiftUI/MagnifyGesture/init(minimumScaleDelta:))

Creates a magnify gesture with a given minimum delta for the
gesture to start.

[`init(minimumScaleDelta:inputKinds:)`](/documentation/SwiftUI/MagnifyGesture/init(minimumScaleDelta:inputKinds:))

Creates a magnify gesture with a given minimum delta for the gesture
to start, and the input kinds the gesture recognizes.

[`minimumScaleDelta`](/documentation/SwiftUI/MagnifyGesture/minimumScaleDelta)

The minimum required delta before the gesture starts.


---

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