--- title: Custom environment values in SwiftUI | daily.dev description: SwiftUI's environment system lets you pass values through the view hierarchy without manual prop drilling. Before Xcode 16, defining custom environment values... canonical: https://daily.dev/posts/custom-environment-values-in-swiftui-h19wwpq4y twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Custom environment values in SwiftUI | daily.dev og:description: SwiftUI's environment system lets you pass values through the view hierarchy without manual prop drilling. Before Xcode 16, defining custom environment values... og:url: https://daily.dev/posts/custom-environment-values-in-swiftui-h19wwpq4y og:image: https://api.daily.dev/og/posts/h19wwPQ4Y.png og:image:alt: Custom environment values in SwiftUI og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Custom environment values in SwiftUI **[Nil Coalescing](https://daily.dev/sources/nilcoalescing)** · 4 min read · 0 upvotes · 0 comments ## Summary SwiftUI's environment system lets you pass values through the view hierarchy without manual prop drilling. Before Xcode 16, defining custom environment values required boilerplate: a struct conforming to EnvironmentKey, a default value, and an EnvironmentValues extension. The @Entry macro introduced in Xcode 16 eliminates this by letting you declare environment values directly in an EnvironmentValues extension with a single line. The macro works with iOS 13+ and macOS 10.15+ as long as the app is built with Xcode 16. The post also covers creating a custom View extension modifier for ergonomic injection and reading values with the @Environment property wrapper in child views. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Introducing @DependencyEntry](https://daily.dev/posts/introducing-dependencyentry-qtbe80zmm) · Point-Free Pointers · 3 upvotes · 0 comments --- Tags: [#ios](https://daily.dev/tags/ios), [#swift](https://daily.dev/tags/swift), [#swiftui](https://daily.dev/tags/swiftui), [#xcode](https://daily.dev/tags/xcode) [View this post on daily.dev](https://daily.dev/posts/custom-environment-values-in-swiftui-h19wwpq4y) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Custom environment values in SwiftUI","url":"https://daily.dev/posts/custom-environment-values-in-swiftui-h19wwpq4y","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/custom-environment-values-in-swiftui-h19wwpq4y"},"datePublished":"2026-08-02T07:15:06.204Z","dateModified":"2026-08-02T07:34:26.199Z","description":"SwiftUI's environment system lets you pass values through the view hierarchy without manual prop drilling. Before Xcode 16, defining custom environment values...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/2264ca6314332f8f4fcff9542d3ff8b9?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/2264ca6314332f8f4fcff9542d3ff8b9?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Nil Coalescing","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Nil Coalescing","logo":"https://media.daily.dev/image/upload/s--rcEu6sag--/f_auto,q_auto/v1785654899/logos/nilcoalescing?_a=BAMAMicg0","url":"https://daily.dev/sources/nilcoalescing"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/custom-environment-values-in-swiftui-h19wwpq4y","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"ios,swift,swiftui,xcode","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Nil Coalescing","item":"https://daily.dev/sources/nilcoalescing"},{"@type":"ListItem","position":3,"name":"Custom environment values in SwiftUI"}]} ```