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How to preview your layout in portrait or landscape

Paul Hudson    @twostraws   

Updated for Xcode 13.0 beta 2

New in iOS 15

SwiftUI has a dedicated previewInterfaceOrientation() modifier that controls the way device previews look in Xcode’s canvas. To use it, pass one of the four device rotation options: .portrait, .portraitUpsideDown, .landscapeLeft, or .landscapeRight.

For example, this will show a landscape left preview:

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
            .previewInterfaceOrientation(.landscapeLeft)
    }
}

Remember, your preview provider can contain several devices and they’ll display one above the other. This means you can have both portrait and landscape visible at the same time:

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()

        ContentView()
            .previewInterfaceOrientation(.landscapeLeft)
    }
}
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