# Environment values Share data throughout a view hierarchy using the environment. ## Overview Views in SwiftUI can react to configuration information that they read from the environment using an [`Environment`](/documentation/SwiftUI/Environment) property wrapper.  A view inherits its environment from its container view, subject to explicit changes from an [`environment(_:_:)`](/documentation/SwiftUI/View/environment(_:_:)) view modifier, or by implicit changes from one of the many modifiers that operate on environment values. As a result, you can configure a entire hierarchy of views by modifying the environment of the group’s container. You can find many built-in environment values in the [`EnvironmentValues`](/documentation/SwiftUI/EnvironmentValues) structure. You can also create a custom [`EnvironmentValues`](/documentation/SwiftUI/EnvironmentValues) property by defining a new property in an extension to the environment values structure and applying the [`Entry()`](/documentation/SwiftUI/Entry()) macro to the variable declaration. ## Topics ### Accessing environment values [`Environment`](/documentation/SwiftUI/Environment) A property wrapper that reads a value from a view’s environment. [`EnvironmentValues`](/documentation/SwiftUI/EnvironmentValues) A collection of environment values propagated through a view hierarchy. ### Creating custom environment values [`Entry()`](/documentation/SwiftUI/Entry()) Creates an environment values, transaction, container values, or focused values entry. [`EnvironmentKey`](/documentation/SwiftUI/EnvironmentKey) A key for accessing values in the environment. ### Modifying the environment of a view [`environment(_:)`](/documentation/SwiftUI/View/environment(_:)) Places an observable object in the view’s environment. [`environment(_:_:)`](/documentation/SwiftUI/View/environment(_:_:)) Sets the environment value of the specified key path to the given value. [`transformEnvironment(_:transform:)`](/documentation/SwiftUI/View/transformEnvironment(_:transform:)) Transforms the environment value of the specified key path with the given function. ### Modifying the environment of a scene [`environment(_:)`](/documentation/SwiftUI/Scene/environment(_:)) Places an observable object in the scene’s environment. [`environment(_:_:)`](/documentation/SwiftUI/Scene/environment(_:_:)) Sets the environment value of the specified key path to the given value. [`transformEnvironment(_:transform:)`](/documentation/SwiftUI/Scene/transformEnvironment(_:transform:)) Transforms the environment value of the specified key path with the given function. --- 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)