How do I make my SwiftUI UIViewRepresentable respect intrinsicContentSize in previews?

Question

When I create a view in SwiftUI and render it in an Xcode preview, using PreviewLayout.sizeThatFits, the preview adjusts its size according to its content. When I import a UIKIt view using UIViewRepresentable, it appears with a full device-size frame.

Is there a way to make SwiftUI respect the intrinsicContentSize of UIView subclasses?

struct Label: UIViewRepresentable {      func makeUIView(context: UIViewRepresentableContext<Label>) -> UILabel {         return UILabel()     }      func updateUIView(_ uiView: UILabel, context: UIViewRepresentableContext<Label>) {         uiView.text = "Some text"     } }  #if DEBUG struct Label_Previews: PreviewProvider {     static var previews: some View {         Group {             Label().previewLayout(.sizeThatFits)         }     } } #endif 

Answer 1

Add the following to your updateUIView function:

uiView.setContentHuggingPriority(.defaultHigh, for: .vertical) uiView.setContentHuggingPriority(.defaultHigh, for: .horizontal)