initWithFileAtURL:size:scale:representationTypes:

Declaration

- (instancetype)initWithFileAtURL:(NSURL *)url size:(CGSize)size scale:(CGFloat)scale representationTypes:(QLThumbnailGenerationRequestRepresentationTypes)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 QLThumbnailGenerationRequestRepresentationTypes.

Return Value