# subscript(dynamicMember:) Returns a scoped attribute container that a key path indicates. ``` subscript(dynamicMember keyPath: KeyPath) -> ScopedAttributeContainer where S : AttributeScope { get set } ``` ## Discussion Use this subscript when you need to work with an explicit attribute scope. For example, the SwiftUI [`foregroundColor`](/documentation/Foundation/AttributeScopes/SwiftUIAttributes/foregroundColor) attribute overrides the attribute in the AppKit and UIKit scopes with the same name. If you work with both the SwiftUI and UIKit scopes, you can use the syntax `myAttributedString.uiKit.foregroundColor` to disambiguate and explicitly use the UIKit attribute. The attribute container that this method returns contains only attributes that exist, and are present and identical for the entire attributed string. To find portions of the string with consistent attributes, use the [`runs`](/documentation/Foundation/AttributedStringProtocol/runs) property. Getting or setting stringwide attributes with this subscript has `O(n)` behavior in the worst case, where `n` is the number of runs. --- 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)