Sets the preview request to data saved within the document or to dynamically generated data.
- macOS 10.0–10.15Deprecated
The preview request object.
The data of the preview returned to the client.
The UTI specifying the content type of the preview.
Additional properties for the preview response. For more on supported keys and values for this dictionary, see Preview Properties. If the saved data is HTML, you may specify a special set of properties; see the discussion below for more information.
This function returns preview data to the client. The data is either extracted from a document where the document’s application has saved it, or it’s dynamically generated. How Quick Look handles the data depends upon the value of
content. The content data of the preview must be of a native Quick Look type. Currently supported UTIs for these types are:
If the UTI type is
k, you can have WebKit handle the layout and display of your preview. You must provide the HTML in
data plus any attachments (for example, Address Book cards, Mail messages, or Omni Outliner documents) in the
properties dictionary. This dictionary takes
k as its key and consists of one ore more subdictionaries (one per attachment). Each subdictionary uses an arbitrary string identifier as a key; the attachment should be referenced within the HTML data using the kQLPreviewContentIDScheme URL scheme (“cid”) and the identifier as the URL resource specifier—for example, “cid:the_identifier”. The keys of the subdictionary properties are
Thread-safety: This function should be called in the same thread as the preview request is made in; generally, this is the same thread in which the GeneratePreviewForURL callback was invoked.