# init(_:) Creates an environment property to read the specified key path. ``` init(_ keyPath: KeyPath) ``` ## Parameters `keyPath` A key path to a specific resulting value. ## Discussion Don’t call this initializer directly. Instead, declare a property with the [`Environment`](/documentation/SwiftUI/Environment) property wrapper, and provide the key path of the environment value that the property should reflect: ``` struct MyView: View { @Environment(\.colorScheme) var colorScheme: ColorScheme // ... } ``` SwiftUI automatically updates any parts of `MyView` that depend on the property when the associated environment value changes. You can’t modify the environment value using a property like this. Instead, use the [`environment(_:_:)`](/documentation/SwiftUI/View/environment(_:_:)) view modifier on a view to set a value for a view hierarchy. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)