PHAssetVideoProgressHandler
The signature for a block that Photos calls while downloading asset data from iCloud. Used by the Progresshandler property.
Declaration
typealias PHAssetVideoProgressHandler = (Double, (any Error)?, UnsafeMutablePointer<ObjCBool>, [AnyHashable : Any]?) -> VoidDiscussion
If you request a video asset whose data is not on the local device, and you have enabled downloading with the isNetworkAccessAllowed property, Photos calls your block periodically to report progress and allow canceling the download.
The block takes the following parameters:
- progress
A floating-point value indicating the progress of the download. A value of
0.0indicates the download has just started, and a value of1.0indicates the download is complete.- error
An
NSErrorobject describing an error that occurred when attempting to download the video, ornilif no errors have occurred.- stop
A pointer to a Boolean value. To cancel the download, set
*stoptotrueinside the block.- info
A dictionary providing additional information about the status of the video request. See Image Result Info Keys for possible keys and values.