Asset Catalog Format Reference: Image Stack Type

A set of layered images combined to enable parallax. For more information on layered images and parallax, see Creating Parallax Artwork in the App Programming Guide for tvOS and Layered Images in the Apple TV Human Interface Guidelines.

Extension

.imagestack

Folder Contents

Image stack layers.

Contents.json File (Required)

Metadata and a list of the image stack layers (Table 19-1).

**Table 19-1**Image stack tags
Key	Type	Description
`info`	Dictionary	Metadata for the author and format version of the asset catalog.
`author`	String	Use your bundle ID.
`version`	Number	The format version of the asset catalog. Use `1`.
`layers`	Array of dictionaries	The layers in the image stack.
`filename`	String	The name of the asset catalog folder containing the layer.
`properties`	Dictionary	Properties for the image stack.
`canvasSize`	Dictionary	The canvas size for the image stack. Defaults to the size of the background layer if the tag is not included.
`width`	Number	The width of the image stack canvas in pixels.
`height`	Number	The height of the image stack canvas in pixels.

Sample Contents.json Files

Simple Image Stack

        {
   "layers" : [
      {
         "filename" : "Foreground.imagestacklayer"
      },
      {
         "filename" : "Llama.imagestacklayer"
      },
      {
         "filename" : "Background.imagestacklayer"
      }
   ],
   "info" : {
      "author" : "com.developerName",
      "version" : 1
   }
}

      

Image Stack with Canvas Size

        {
   "layers" : [
      {
         "filename" : "Foreground.imagestacklayer"
      },
      {
         "filename" : "Llama.imagestacklayer"
      },
      {
         "filename" : "Background.imagestacklayer"
      }
   ],
   "info" : {
      "author" : "com.developerName",
      "version" : 1
   },
   "properties" : {
      "canvasSize" : {
         "width" : 2048
         "height" : 1365
      }
   }
}

      