Initializer

init(fileAt:size:scale:representationTypes:)

Creates a new request for a thumbnail with the specified parameters for a file at a provided URL.

Declaration

init(fileAt url: URL, size: CGSize, scale: CGFloat, representationTypes: QLThumbnailGenerator.Request.RepresentationTypes)

Parameters

url

The URL of the file for which you want to create a thumbnail.

size

The desired size of the thumbnails.

scale

The scale of the thumbnails. This parameter usually represents the scale of the current screen. However, you can pass a screen scale to the initializer that isn’t the current device’s screen scale. For example, you can create thumbnails for different scales and upload them to a server in order to download them later on devices with a different screen scale.

representationTypes

The different thumbnail types. For a list of all possible thumbnail representation types, see QLThumbnailGenerator.Request.RepresentationTypes.

Return Value

An initialized request object to create a thumbnail for a file.