XCode 13 Alternate App Icons

Preamble

With the beta of XCode 13 creating alternate app icons is now much simpler and requires much less manual steps than previously. This repo shows how to add alternate app icons and a super simple SwiftUI interface for changing them.

Prepare App Images

Add an iOS App icon asset catalog for each alternate app icon you want to add. Also add an Image Set for each icon. This is necessary because Image will not show an app icon asset.

Populate all the necessary sizes of app icon image in the asset catalog.

Build Settings

Asset Catalog Compiler - Options

Set Include All App Icon Assets to Yes.

Double click on Alternate App Icon Sets and type in the names of your alternate app icons assets, separate with a comma i.e. Green, Blue.

Code

VStack{

    Text("Change App Icon")
        .font(.title)

    HStack{

        Button(action: {
            UIApplication.shared.setAlternateIconName(nil)
        }){
            Image("AppIconImage")
                .cornerRadius(20)
        }

        Button(action: {
            UIApplication.shared.setAlternateIconName("BlueIcon")
        }){
            Image("BlueImage")
                .cornerRadius(20)
        }

        Button(action: {
            UIApplication.shared.setAlternateIconName("GreenIcon")
        }){

            Image("GreenImage")
                .cornerRadius(20)
        }
    }
}

Final result

References

XCode 13 Beta Release Notes

Hacking With Swift - How to change your app icon dynamically with setalternateiconname