Trevor Whittingham • 12/10/2024

Replace Scroll Geometry Hacks With SwiftUI's iOS 18 Scroll APIs

This article discusses how iOS 18 introduces new SwiftUI scroll APIs such as onScrollGeometryChange, onScrollVisibilityChange, and ScrollPosition, which replace the traditional workaround of using GeometryReader and PreferenceKeys to track scroll offset. It explains how to use these APIs to implement features like showing a back-to-top button, detecting scroll threshold, and pagination, with code examples. The APIs are available across Apple platforms and simplify scroll-related UI logic.

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#Swiftui #Ios 18 #Scroll Geometry