SwiftUI Repaint View Components on Device Rotation

Question

How to detect device rotation in SwiftUI and re-draw view components?

I have a @State variable initialized to the value of UIScreen.main.bounds.width when the first

Answer 1

There is an easier solution that the one provided by @kontiki, with no need for notifications or integration with UIKit.

In SceneDelegate.swift:

    func windowScene(_ windowScene: UIWindowScene, didUpdate previousCoordinateSpace: UICoordinateSpace, interfaceOrientation previousInterfaceOrientation: UIInterfaceOrientation, traitCollection previousTraitCollection: UITraitCollection) {
        model.environment.toggle()
    }

In Model.swift:

final class Model: ObservableObject {
    let objectWillChange = ObservableObjectPublisher()

    var environment: Bool = false { willSet { objectWillChange.send() } }
}

The net effect is that the views that depend on the @EnvironmentObject model will be redrawn each time the environment changes, be it rotation, changes in size, etc.