使用 NSPrintOperation 时将 showsPrintPanel 设置为 false 会导致打印时尺寸不同

Question

当使用 NSPrintOperation 并将 showPrintPanel 设置为 true 时，视图打印得很好，但是当我将属性设置为 false 时，视图打印不正确并且比纸张大：

func printBadge(printerName: String){
    let printingFrame = NSRect(x: 0, y: 0, width: AppManager.sharedInstance.badge.width, height: AppManager.sharedInstance.badge.height)
    let badgeView = BadgeView(frame: printingFrame)
    let printOperation = NSPrintOperation(view: badgeView)
    let printInfo = printOperation.printInfo

    printInfo.printer = NSPrinter(name: printerName)!
    printInfo.paperSize = NSSize(width: AppManager.sharedInstance.badge.width, height: AppManager.sharedInstance.badge.height)
    printInfo.horizontalPagination = .AutoPagination
    printInfo.verticalPagination = .AutoPagination
    printInfo.topMargin = 0
    printInfo.bottomMargin = 0
    printInfo.rightMargin = 0
    printInfo.leftMargin = 0
    printInfo.horizontallyCentered = true
    printInfo.verticallyCentered = true
    printOperation.showsPrintPanel = AppManager.sharedInstance.showsPrintPanel!
    printOperation.runOperation()
}

Answer 1

最后我解决了这个问题，NSPrintInfo.paperSize取的是POINTS而不是PIXELS，所以我从毫米到像素的计算不正确（打印机设置的单位是毫米而不是像素或点）。

如果有人感兴趣，从毫米到点的数学计算是；

millimetres * 72 / 25.4

使用 NSPrintOperation 时将 showsPrintPanel 设置为 false 会导致打印时尺寸不同

Setting showsPrintPanel to false when using NSPrintOperation causes different sizes when printing

macos

cocoa

nsprintoperation

nsprintinfo

nsprintpanel