--- title: Initializing @Observable classes with the @State macro... description: Xcode 27 changes @State from a property wrapper to a Swift macro, introducing lazy evaluation of initial values. This fixes a long-standing issue where... canonical: https://daily.dev/posts/initializing-observable-classes-with-the-state-macro-in-xcode-27-mxecv6ugp twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Initializing @Observable classes with the @State macro in Xcode 27 | daily.dev og:description: Xcode 27 changes @State from a property wrapper to a Swift macro, introducing lazy evaluation of initial values. This fixes a long-standing issue where... og:url: https://daily.dev/posts/initializing-observable-classes-with-the-state-macro-in-xcode-27-mxecv6ugp og:image: https://api.daily.dev/og/posts/MXecV6UGp.png og:image:alt: Initializing @Observable classes with the @State macro in Xcode 27 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. # Initializing @Observable classes with the @State macro in Xcode 27 **[Nil Coalescing](https://daily.dev/sources/nilcoalescing)** · 4 min read · 0 upvotes · 0 comments ## Summary Xcode 27 changes @State from a property wrapper to a Swift macro, introducing lazy evaluation of initial values. This fixes a long-standing issue where @Observable class initializers ran on every view struct recreation, causing unnecessary work. The post explains the behavior change with a concrete code example, notes that the fix is back-deployed to iOS 17/macOS 14 and later when compiled with Xcode 27, and warns against the still-problematic anti-pattern of assigning observable instances inside a view's init(). ## Full article daily.dev links to this article rather than hosting it. 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