PrinterToPrint，不显示打印作业进度对话框

I am using iOs default PrinterToPrint in Xamarin to print without showing dialog to choose printer but then also it's showing one dialog which says printing to [PRINTER NAME]. Is there anyway to hide the dialog as well. Like complete silent print functionality?

我在Xamarin中使用iOs默认的PrinterToPrint进行打印而没有显示选择打印机的对话框，但是它还显示了一个对话框，表示打印到[PRINTER NAME]。反正也有隐藏对话框。像完整的静音打印功能？

I am not its possible but I have seen some apps which do that and I am not sure whether they are using the same function or not.

我不是可能的，但我看到一些应用程序这样做，我不确定他们是否使用相同的功能。

Thanks in advance.

提前致谢。

1 个解决方案

#1

Update:

UIPrinterPickerController comes from UIKit and as such there is no way to push the "printing" process to the background and off the main UI thread.

UIPrinterPickerController来自UIKit，因此没有办法将“打印”过程推送到后台和主UI线程。

In the current UIPrintInteractionController.PrintToPrinter implementation (currently up to iOS 10.3 B4) there is no exposed way to disable the print progress (Connecting, Preparing, etc...) alart/dialog (w/ Cancel button) or to modify its appearance.

在当前的UIPrintInteractionController.PrintToPrinter实现中（目前达到iOS 10.3 B4），没有公开的方法来禁用打印进度（连接，准备等...）alart / dialog（带取消按钮）或修改其外观。

This interface is high level wrapper using AirPrint and thus Internet Print Protocol (IPP) at a lower level to preform the actual printing, job queue monitoring on the printer, etc... IPP is not currently exposed as a publicly available framework within iOS...

此接口是使用AirPrint的高级包装器，因此是较低级别的Internet打印协议（IPP），用于执行打印机上的实际打印，作业队列监控等... IPP目前未作为iOS中公开可用的框架公开。 ..

Programs that allow background printing are not using UIPrintInteractionController to do the printing. Most do use UIPrinterPickerController to obtain a UIPrinter selection from the user, but then use the UIPrinter.Url.AbsoluteUrl to "talk" directly to the printer via HTTP/HTTPS Post/Get. Depending upon the printers used, TCP-based sockets are also an option vs. IPP and even USB/serial for direct connected printers.

允许后台打印的程序不使用UIPrintInteractionController进行打印。大多数人都使用UIPrinterPickerController从用户那里获取UIPrinter选择，然后使用UIPrinter.Url.AbsoluteUrl通过HTTP / HTTPS Post / Get直接与打印机“对话”。根据所使用的打印机，基于TCP的套接字也是IPP的选项，甚至是直接连接打印机的USB /串行选项。

Re: https://en.wikipedia.org/wiki/Internet_Printing_Protocol

回复：https：//en.wikipedia.org/wiki/Internet_Printing_Protocol

Original:

Pick a Printer:

选择一台打印机：

if (allowUserToSelectDifferentPrinter || printerUrl == null)
{
    UIPrinter uiPrinter = printerUrl != null ? null as UIPrinter : UIPrinter.FromUrl(new NSUrl(printerUrl));
    var uiPrinterPickerController = UIPrinterPickerController.FromPrinter(uiPrinter);
    uiPrinterPickerController.Present(true, (printerPickerController, userDidSelect, error) =>
    {
        if (userDidSelect)
        {
            uiPrinter = uiPrinterPickerController?.SelectedPrinter;
            printerUrl = uiPrinter.Url.AbsoluteUrl.ToString();
            Console.WriteLine($"Save this UIPrinter's Url string for later use: {printerUrl}");
        }
    });
}

Print using UIPrintInteractionController with an existing UIPrinter:

使用UIPrintInteractionController与现有UIPrinter打印：

if (printerUrl != null)
{
    // re-create a UIPrinter from a saved NSUrl string
    var uiPrinter = UIPrinter.FromUrl(new NSUrl(printerUrl));
    var printer = UIPrintInteractionController.SharedPrintController;
    printer.ShowsPageRange = false;
    printer.ShowsNumberOfCopies = false;
    printer.ShowsPaperSelectionForLoadedPapers = false;
    var printInfo = UIPrintInfo.PrintInfo;

    printInfo.OutputType = UIPrintInfoOutputType.General;
    printInfo.JobName = "* Print Job";
    var textFormatter = new UISimpleTextPrintFormatter("* Rocks")
    {
        StartPage = 0,
        ContentInsets = new UIEdgeInsets(72, 72, 72, 72),
        MaximumContentWidth = 6 * 72,
    };
    printer.Delegate = new PrintInteractionControllerDelegate();
    printer.PrintFormatter = textFormatter;
    printer.PrintToPrinter(uiPrinter, (printInteractionController, completed, error) =>
    {
        if ((completed && error != null))
        {
            Console.WriteLine($"Print Error: {error.Code}:{error.Description}");
            PresentViewController(
                UIAlertController.Create("Print Error", "Code: {error.Code} Description: {error.Description}", UIAlertControllerStyle.ActionSheet),
                true, () => { });
        }
        printInfo?.Dispose();
        uiPrinter?.Dispose();

        uiPrinter.
    });
}
else
{
    Console.WriteLine("User has not selected a printer...printing disabled");
}