Class

PHAssetResourceManager

A resource manager for the data storage underlying a Photos asset.

Declaration

class PHAssetResourceManager : NSObject

Overview

An asset can have multiple underlying data resources—for example, both original and edited versions—each of which is represented by a PHAssetResource object. Unlike the PHImageManager class, which provides and caches the primary representations of assets as thumbnails, image objects, or video objects, the asset resource manager provides direct access to these underlying data resources.

Topics

Getting the Asset Resource Manager

class func `default`() -> PHAssetResourceManager

Returns the shared asset resource manager object.

Requesting Resources

func requestData(for: PHAssetResource, options: PHAssetResourceRequestOptions?, dataReceivedHandler: (Data) -> Void, completionHandler: (Error?) -> Void) -> PHAssetResourceDataRequestID

Requests the underlying data for the specified asset resource, to be delivered asynchronously.

func cancelDataRequest(PHAssetResourceDataRequestID)

Cancels an asynchronous request.

func writeData(for: PHAssetResource, toFile: URL, options: PHAssetResourceRequestOptions?, completionHandler: (Error?) -> Void)

Requests the underlying data for the specified asset resource, to be asynchronously written to a local file.

Constants

typealias PHAssetResourceDataRequestID

A numeric identifier for an asynchronous asset resource loading request.

Resource Loading Request Identifiers

Special values for the PHAssetResourceDataRequestID identifier that are returned by asynchronous requests.

Relationships

Inherits From

NSObject