---
title: "onMapCameraChange(frequency:_:)"
framework: SwiftUI
role: symbol
role_heading: Instance Method
platforms: [iOS 17.0+, iPadOS 17.0+, Mac Catalyst 17.0+, macOS 14.0+, tvOS 17.0+, watchOS 10.0+]
path: "swiftui/view/onmapcamerachange(frequency:_:)-2pcga"
---

# onMapCameraChange(frequency:_:)

Performs an action when Map camera framing changes

## Declaration

```swift
@MainActor @preconcurrency func onMapCameraChange(frequency: MapCameraUpdateFrequency = .onEnd, _ action: @escaping (MapCameraUpdateContext) -> Void) -> some View

```

## Parameters

- `frequency`: How frequently the action should be performed during a camera interaction.
- `action`: A closure to run when the camera framing changes. The closure takes a MapCameraUpdateContext parameter that indicates the camera and the framed area.