photo_gallery/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json

{
  "images": [
    {
      "idiom": "universal",
      "filename": "LaunchImage.png",
      "scale": "1x"
    },
    {
      "idiom": "universal",
      "filename": "LaunchImage@2x.png",
      "scale": "2x"
    },
    {
      "idiom": "universal",
      "filename": "LaunchImage@3x.png",
      "scale": "3x"
    }
  ],
  "info": {
    "version": 1,
    "author": "xcode"
  }
}