UIPrintFormatter
An abstract base class for print formatters, which are objects that lay out custom printable content that can cross page boundaries.
Declaration
class UIPrintFormatterOverview
Given a print formatter, the printing system can automate the printing of the type of content associated with the print formatter. Examples of such content could be a web view, a mix of images and text, or a long text document. The UIKit framework provides several concrete subclasses of UIPrintFormatter: UISimpleTextPrintFormatter, UIMarkupTextPrintFormatter, and UIViewPrintFormatter.
You can assign a single print formatter for a print job using the printFormatter property of the UIPrintInteractionController shared instance; or you can specify one or more print formatters that are associated with specific pages of a page renderer through the addPrintFormatter(_:startingAtPageAt:)method of UIPrintPageRenderer. A page renderer is an instance of a custom subclass of UIPrintPageRenderer that draws content for printing.
UIPrintFormatter publishes an interface that allows you to specify the starting page for a print job and the margins around the printed content; given that information plus the content, a print formatter computes the number of pages for the print job. The following image depicts the print-formatter properties, along with certain UIPrintPaper and UIPrintPageRenderer properties, that define the layout of a multipage print job.
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Third-party subclasses of UIPrintFormatter aren’t recommended. If you have custom content to print, use a custom UIPrintPageRenderer object.