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# AVAssetResourceLoader

An object that mediates resource requests from a URL asset.

```
class AVAssetResourceLoader
```

## Overview

You do not create resource loader objects yourself. Instead, you retrieve a resource loader from the [`resourceLoader`](/documentation/AVFoundation/AVURLAsset/resourceLoader) property of an [`AVURLAsset`](/documentation/AVFoundation/AVURLAsset) object and use it to assign your custom delegate object.

The delegate you associate with this object must adopt the [`AVAssetResourceLoaderDelegate`](/documentation/AVFoundation/AVAssetResourceLoaderDelegate) protocol. For more information, see [`AVAssetResourceLoaderDelegate`](/documentation/AVFoundation/AVAssetResourceLoaderDelegate).

## Topics

### Accessing the delegate

[`setDelegate(_:queue:)`](/documentation/AVFoundation/AVAssetResourceLoader/setDelegate(_:queue:))

Sets the delegate and dispatch queue to use with the resource loader.

[`delegate`](/documentation/AVFoundation/AVAssetResourceLoader/delegate)

The delegate object to use when handling resource requests.

[`AVAssetResourceLoaderDelegate`](/documentation/AVFoundation/AVAssetResourceLoaderDelegate)

Methods you can implement to handle resource-loading requests coming from a URL asset.

[`delegateQueue`](/documentation/AVFoundation/AVAssetResourceLoader/delegateQueue)

The dispatch queue to use when handling resource requests.

### Loading content keys

[`preloadsEligibleContentKeys`](/documentation/AVFoundation/AVAssetResourceLoader/preloadsEligibleContentKeys)

A Boolean value that indicates whether content keys will be loaded as quickly as possible.

### Supporting Common Media Client Data

[`sendsCommonMediaClientDataAsHTTPHeaders`](/documentation/AVFoundation/AVAssetResourceLoader/sendsCommonMediaClientDataAsHTTPHeaders)

A Boolean value that indicates whether to enable attaching Common Media Client Data as HTTP request headers.


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