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# AVAssetResourceLoaderDelegate

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

```
protocol AVAssetResourceLoaderDelegate : NSObjectProtocol
```

## Overview

A class should adopt this protocol when associated with the asset’s resource loader—that is, an instance of the [`AVAssetResourceLoader`](/documentation/AVFoundation/AVAssetResourceLoader) class. The resource loader works with your delegate to process the request.

## Topics

### Processing resource requests

[`resourceLoader(_:shouldWaitForLoadingOfRequestedResource:)`](/documentation/AVFoundation/AVAssetResourceLoaderDelegate/resourceLoader(_:shouldWaitForLoadingOfRequestedResource:))

Asks the delegate if it wants to load the requested resource.

[`resourceLoader(_:shouldWaitForRenewalOfRequestedResource:)`](/documentation/AVFoundation/AVAssetResourceLoaderDelegate/resourceLoader(_:shouldWaitForRenewalOfRequestedResource:))

Tells the delegate when assistance is required of the application to renew a resource.

[`resourceLoader(_:didCancel:)`](/documentation/AVFoundation/AVAssetResourceLoaderDelegate/resourceLoader(_:didCancel:)-3nl51)

Informs the delegate that a prior loading request has been cancelled.

### Processing authentication challenges

[`resourceLoader(_:shouldWaitForResponseTo:)`](/documentation/AVFoundation/AVAssetResourceLoaderDelegate/resourceLoader(_:shouldWaitForResponseTo:))

Tells the delegate that assistance is required of the application to respond to an authentication challenge.

[`resourceLoader(_:didCancel:)`](/documentation/AVFoundation/AVAssetResourceLoaderDelegate/resourceLoader(_:didCancel:)-1wqin)

Informs the delegate that a prior authentication challenge has been cancelled.


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