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This backport is now available as Backport.ScaledMetric, in a single Backports library, with a LOT more additions. This should simply my efforts and allow me and others to contribute more backports in the near future. SwiftUI Backports

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ScaledMetric

Also available as a part of my SwiftUI+ Collection – just add it to Xcode 13+

A dynamic property wrapper that scales a numeric value. Identical to the new iOS 14 implementation, but back-ported to suport iOS 13 as well.

Example

@ScaledMetric(wrappedValue: 4)
private var spacing: CGFloat

...
// the spacing will automatically scale with the current `ContentSizeCategory` value
VStack(spacing: spacing) { ... }

Installation

The code is packaged as a framework. You can install manually (by copying the files in the Sources directory) or using Swift Package Manager (preferred)

To install using Swift Package Manager, add this to the dependencies section of your Package.swift file:

.package(url: "https://github.com/SwiftUI-Plus/ScaledMetric.git", .upToNextMinor(from: "1.0.0"))

Note: The package requires iOS v13+

Other Packages

If you want easy access to this and more packages, add the following collection to your Xcode 13+ configuration:

https://benkau.com/packages.json