ipad - Swift does not print double-sided or shows the latest printer settings

Question

The 'duplex' area does not work in any way. I just want to print double-sided..

The printer sees the last printed setting every time. I want to rewrite this information. please help me.

let printInfo = UIPrintInfo(dictionary: nil)
printInfo.duplex = .shortEdge

let printController = UIPrintInteractionController.shared
printController.printInfo = printInfo
printController.showsNumberCopies = true
printController.printingItem = guide_url
printController.present(animated: ture, completionHandler: nil)

Answer 1

等待大神答复