QLThumbnailCreate(_:_:_:_:)
Returns a thumbnail that’s generated in the background.
Declaration
func QLThumbnailCreate(_ allocator: CFAllocator!, _ url: CFURL!, _ maxThumbnailSize: CGSize, _ options: CFDictionary!) -> Unmanaged<QLThumbnail>!Parameters
- allocator:
The allocator to use to create the thumbnail.
- url:
The URL of the document that you want to request a thumbnail for.
- maxThumbnailSize:
The maximum size in points for the thumbnail image.
- options:
Optional hints for creating a thumbnail image. Available options are Kqlthumbnailoptionscalefactorkey and Kqlthumbnailoptioniconmodekey.
Return Value
A generated thumbnail of the file at the provided url.