NEW: Join my free 100 Days of SwiftUI challenge today! >>

How to preview your layout in different devices

Paul Hudson    @twostraws   

Fully updated for Xcode 11.2

Xcode’s SwiftUI preview lets us show our designs in multiple screen sizes at the same time using the .previewDevice() modifier. This needs to be provided with the exact name of a device as seen in Xcode’s destination menu, e.g. “iPhone XS Max”.

For example, this shows a preview on the iPhone SE:

ContentView()
    .previewDevice(PreviewDevice(rawValue: "iPhone SE"))

When using specific devices for previewing, you’re likely to find it useful to add in the .previewDisplayName() modifier, which lets you put a name under a device in the preview window.

For example, this creates two previews for two different devices, adding the name of each to make it clear what’s going on:

#if DEBUG
struct ContentView_Previews: PreviewProvider {
   static var previews: some View {
      Group {
         ContentView()
            .previewDevice(PreviewDevice(rawValue: "iPhone SE"))
            .previewDisplayName("iPhone SE")

         ContentView()
            .previewDevice(PreviewDevice(rawValue: "iPhone XS Max"))
            .previewDisplayName("iPhone XS Max")
      }
   }
}
#endif

LEARN SWIFTUI FOR FREE I have a massive, free SwiftUI video collection on YouTube teaching you how to build complete apps with SwiftUI – check it out!

Similar solutions…

BUY OUR BOOKS
Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

Was this page useful? Let us know!

Average rating: 4.8/5