Peter Steinberger • 6/11/2025

Automatic Observation Tracking in UIKit and AppKit: The Feature Apple Forgot to Mention

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Apple has quietly introduced automatic observation tracking for UIKit and AppKit in iOS 18 and macOS 15. This feature allows developers to enable automatic UI updates when @Observable model properties change, eliminating the need for manual setNeedsDisplay() calls. The article explains how to activate it via a plist key and demonstrates its use in view controllers and views, detailing the supported lifecycle methods where the tracking works.

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#Appkit #Uikit #Ios 18
Automatic Observation Tracking in UIKit and AppKit: The Feature Apple Forgot to Mention

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