ios - UIPrintInteractionController，关闭双面选项？

Question

当使用 UIPrintInteractionController 时，

关闭“页面范围”和“份数”选项很容易

UIPrintInteractionController *pic =
      [UIPrintInteractionController sharedPrintController];
pic.delegate = self;
pic.printInfo = pif;
pic.printFormatter = formatter;
pic.showsPageRange = NO;
pic.showsNumberOfCopies = NO;

有没有办法关闭双面选项？

相反，有没有人真正向 Apple 确认过，无法关闭双面选项？如果是这样谢谢。

Answer 1

var 双工:UIPrintInfoDuplex

根据官方文档:-

If a printer is capable of duplex printing, a switch in the printing options allows users to toggle between single-side and double-sided printing. See the description of the UIPrintInfoDuplex constants for more information.

enum UIPrintInfoDuplex : Int {
    case None
    case LongEdge
    case ShortEdge
}

none:无双面(duplex)打印；仅单面打印。

UIPrintInfo *printInfo = [UIPrintInfo printInfo];
printInfo.duplex = UIPrintInfoDuplexLongEdge;
printController.printInfo = printInfo//printController is instance of UIPrintInteractionController