---
title: supportsZoom
framework: uikit
role: symbol
role_heading: Type Property
path: uikit/uiaccessibilitytraits/supportszoom
---

# supportsZoom

The accessibility element supports zooming in and out on its content.

## Declaration

```swift
nonisolated static let supportsZoom: UIAccessibilityTraits
```

## Discussion

Discussion Use this trait to characterize an accessibility element that supports zoom functionality, like letting a person perform expand and pinch gestures to zoom in and out. If you assign this trait to an element, you also need to implement accessibilityZoomIn(at:) and accessibilityZoomOut(at:). For example, the following code shows how to assign this trait to a custom view that allows zooming in to an image: class ViewController: UIViewController {     let zoomView = ZoomingImageView(frame: .zero)     let imageView = UIImageView(image: UIImage(named: "tree"))

override func viewDidLoad() {         super.viewDidLoad()

zoomView.isAccessibilityElement = true         zoomView.accessibilityLabel = "Zooming Image View"         zoomView.accessibilityTraits = [.image, .supportsZoom]

zoomView.addSubview(imageView)         view.addSubview(zoomView)     } } This custom view implements the required methods to modify the zoom scale and post an announcement about the new zoom scale. class ZoomingImageView: UIScrollView {     override func accessibilityZoomIn(at point: CGPoint) -> Bool {         zoomScale += 1.0

let zoomQuantity = "\(Int(zoomScale)) x zoom"         UIAccessibility.post(notification: .announcement, argument: zoomQuantity)         return true     }

override func accessibilityZoomOut(at point: CGPoint) -> Bool {         zoomScale -= 1.0

let zoomQuantity = "\(Int(zoomScale)) x zoom"         UIAccessibility.post(notification: .announcement, argument: zoomQuantity)         return true     } } note: Session 10036: Build accessible apps with SwiftUI and UIKit

## See Also

### Constants

- [none](uikit/uiaccessibilitytraits/none.md)
- [button](uikit/uiaccessibilitytraits/button.md)
- [link](uikit/uiaccessibilitytraits/link.md)
- [image](uikit/uiaccessibilitytraits/image.md)
- [searchField](uikit/uiaccessibilitytraits/searchfield.md)
- [toggleButton](uikit/uiaccessibilitytraits/togglebutton.md)
- [keyboardKey](uikit/uiaccessibilitytraits/keyboardkey.md)
- [staticText](uikit/uiaccessibilitytraits/statictext.md)
- [header](uikit/uiaccessibilitytraits/header.md)
- [tabBar](uikit/uiaccessibilitytraits/tabbar.md)
- [summaryElement](uikit/uiaccessibilitytraits/summaryelement.md)
- [selected](uikit/uiaccessibilitytraits/selected.md)
- [notEnabled](uikit/uiaccessibilitytraits/notenabled.md)
- [adjustable](uikit/uiaccessibilitytraits/adjustable.md)
- [allowsDirectInteraction](uikit/uiaccessibilitytraits/allowsdirectinteraction.md)