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# PHAssetResource

An underlying data resource associated with a photo, video, or Live Photo asset in the Photos library.

```
class PHAssetResource
```

## Overview

Each [`PHAsset`](/documentation/Photos/PHAsset) object references one or more resources. Use these objects to work with those resources directly, like when backing up or restoring assets.

- A photo asset can contain both JPEG and RAW files representing the same photo.
- A Live Photo asset contains both still photo and video resources.
- An edited asset contains resources representing asset content before and after the edit, as well as a resource corresponding to the [`PHAdjustmentData`](/documentation/Photos/PHAdjustmentData) object that describes the edit.

To work with the data contained in an asset resource, fetch it using the [`PHAssetResourceManager`](/documentation/Photos/PHAssetResourceManager) class.

## Topics

### Retrieving an Asset’s Data Resources

[`assetResources(for:)`](/documentation/Photos/PHAssetResource/assetResources(for:)-27o4l)

Returns the list of data resources associated with an asset.

[`assetResources(for:)`](/documentation/Photos/PHAssetResource/assetResources(for:)-2fedw)

Returns the list of data resources associated with a Live Photo object.

### Inspecting an Asset Resource

[`type`](/documentation/Photos/PHAssetResource/type)

The relationship of an asset resource to its owning asset.

[`PHAssetResourceType`](/documentation/Photos/PHAssetResourceType)

Describes the relationship of an asset resource to its owning asset.

[`contentType`](/documentation/Photos/PHAssetResource/contentType)

The content type of the data associated with this asset resource (the data can be retrieved via `PHAssetResourceManager`)

[`assetLocalIdentifier`](/documentation/Photos/PHAssetResource/assetLocalIdentifier)

The unique identifier the system associates for a local asset object.

[`uniformTypeIdentifier`](/documentation/Photos/PHAssetResource/uniformTypeIdentifier)

The uniform type identifier for the asset resource’s image or video data.

[`originalFilename`](/documentation/Photos/PHAssetResource/originalFilename)

The original filename of the asset resource from when it was created or imported.

[`pixelHeight`](/documentation/Photos/PHAssetResource/pixelHeight)

The height of the resource, in pixels.

[`pixelWidth`](/documentation/Photos/PHAssetResource/pixelWidth)

The width of the resource, in pixels.


---

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