Global Variable

PHImageCancelledKey

A key whose value indicates whether the image request was canceled.

Declaration

let PHImageCancelledKey: String

Discussion

This key provides information about an image loading result in the resultHandler block for methods listed in Requesting Images. The corresponding value is an NSNumber object containing a Boolean value.If you call the cancelImageRequest(_:) method to cancel a request, Photos calls your result handler block with the value true for this key.