Trevor Whittingham • 4/29/2025

Keep An iOS 18 Control Center Toggle In Sync With App State

This article provides a technical tutorial for iOS developers on how to create a Control Center toggle in iOS 18 that stays synchronized with the app's internal state. It covers sharing state between the app and widget extension using App Group UserDefaults, defining a toggle intent with App Intents, and ensuring the toggle reflects the current boolean state without requiring user interaction. The example uses a Focus Mode toggle, with code targeting iOS 18 and iPadOS 18, and includes best practices for production apps.

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#Swift #Widgetkit #Ios 18