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 Representationtypes Swift.struct.
Return Value
An initialized request object to create a thumbnail for a file.