DebugLayout

Ole Begemann, 2022-09

Based on: objc.io, Swift Talk episode 318, Inspecting SwiftUI's Layout Process (2022-08)

Inspect the layout algorithm of SwiftUI views, i.e. what sizes views propose to their children and what sizes they return to their parents.

Requirements

iOS 16.0 or macOS 13.0 (requires the Layout protocol).

Instructions

1. import DebugLayout

2. Add .debugLayout() at each point in a view tree where you want to inspect the layout algorithm (what sizes are being proposed and returned).

3. At the top of the view tree you want to inspect, add .startDebugLayout().

See the README of the sample app for a complete example.