Class

AVAssetResourceLoadingContentInformationRequest

A query used to get essential information about a resource referenced by an asset resource loading request.

Declaration

class AVAssetResourceLoadingContentInformationRequest : NSObject

Overview

When a resource loading delegate, which must implement the AVAssetResourceLoaderDelegate protocol, receives an instance of AVAssetResourceLoadingRequest when the resourceLoader(_:shouldWaitForLoadingOfRequestedResource:) is invoked and accepts responsibility for loading the resource, it must check whether the contentInformationRequest property of the AVAssetResourceLoadingRequest is not nil. Whenever the value is not nil, the request includes a query for the information that AVAssetResourceLoadingContentInformationRequest encapsulates. In response to such queries, the resource loading delegate should set the values of the content information request's properties appropriately before invoking the AVAssetResourceLoadingRequest method finishLoading().

When finishLoading() is invoked, the values of the properties of its contentInformationRequest property will, in part, determine how the requested resource is processed. For example, if the requested resource’s URL is the URL of an AVURLAsset and contentType is set by the resource loading delegate to a value that the underlying media system doesn’t recognize as a supported media file type, operations on the AVURLAsset, such as playback, are likely to fail.

Topics

Configuring Content Information

var allowedContentTypes: [String]?

The types of data that are accepted as a valid response for the requested resource.

var contentType: String?

The UTI that specifies the type of data contained by the requested resource.

var contentLength: Int64

The length, in bytes, of the requested resource.

var isByteRangeAccessSupported: Bool

A Boolean value that indicates whether random access to arbitrary ranges of bytes of the resource is supported.

var renewalDate: Date?

The date at which a new resource loading request will be issued for resources that expire, if the media system still requires it.

Relationships

Inherits From

Conforms To

See Also

Asset Retrieval

class AVURLAsset

A concrete subclass of AVAsset that's used to initialize an asset from a local or remote URL.

class AVAssetDownloadURLSession

A URL session used to support the creation and execution of asset download tasks.

class AVAssetResourceLoader

An object that mediates resource requests from a URL asset.

class AVAssetResourceLoadingRequest

An object that encapsulates information about a resource request issued by a resource loader object.

var response: URLResponse?

The URL response for the loading request.

class AVAssetResourceRenewalRequest

An object that encapsulates information about a resource request issued by a resource loader to renew a previously issued request.

class AVAssetResourceLoadingDataRequest

An object used to request data from a resource referenced by an asset resource loading request.

class AVAssetDownloadStorageManager

A manager of policies used to automatically purge downloaded assets.

class AVAssetDownloadStorageManagementPolicy

A set of properties that defines a policy to automatically purge downloaded assets.

class AVMutableAssetDownloadStorageManagementPolicy

A mutable set of properties that defines a policy to automatically purge downloaded assets.