# environmentObject(_:) Supplies an observable object to a view’s hierarchy. ``` nonisolated func environmentObject(_ object: T) -> some View where T : ObservableObject ``` ## Parameters `object` The object to store and make available to the view’s hierarchy. ## Discussion Use this modifier to add an observable object to a view’s environment. The object must conform to the protocol. Adding an object to a view’s environment makes the object available to subviews in the view’s hierarchy. To retrieve the object in a subview, use the [`EnvironmentObject`](/documentation/SwiftUI/EnvironmentObject) property wrapper. > Note: If the observable object conforms to the > > protocol, use either ``doc://com.apple.SwiftUI/documentation/SwiftUI/View/environment(_:)`` or the > ``doc://com.apple.SwiftUI/documentation/SwiftUI/View/environment(_:_:)`` modifier to add the object to the view’s > environment. --- 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)