打印预览中未显示条形码。(Objective C)

Question

我有一个包含一些条形码的 pdf 文件。在 WKWebView 中，pdf 预览很好（显示条形码）。但是在打印预览中条形码没有出现。

这是我正在使用的代码。

#define kPrintingPerPageEdgeInsets UIEdgeInsetsMake(60, 40, 60, 40)

- (void)presentPrintInteractionControllerWithFormatter:(UIPrintFormatter *)printFormatter
                                               jobName:(NSString *)jobName
                                           contentType:(PrintingContentType)contentType
                              actionSheetBarButtonItem:(UIBarButtonItem *)barButtonItem
                                 printInfoOrientation:(UIPrintInfoOrientation) printOrientation
{
    UIPrintInteractionController *printInteractionController = [[self class] createPrintInteractionControllerWithJobName:jobName];
    printInteractionController.printFormatter = printFormatter;
    printInteractionController.printFormatter.perPageContentInsets = kPrintingPerPageEdgeInsets;
    printInteractionController.printInfo.orientation = printOrientation;
    [self presentPrintInteractionController:printInteractionController
                                contentType:contentType
                              barButtonItem:barButtonItem];
}

+ (UIPrintInteractionController *)createPrintInteractionControllerWithJobName:(NSString *)jobName
{
    UIPrintInteractionController *printInteractionController = [UIPrintInteractionController sharedPrintController];
    printInteractionController.printingItem = nil;
    printInteractionController.printFormatter = nil;

    UIPrintInfo *printInfo = [UIPrintInfo printInfo];
    printInfo.outputType = UIPrintInfoOutputGeneral;
    printInfo.jobName = jobName;
    printInteractionController.printInfo = printInfo;

    return printInteractionController;
}

Answer 1

我自己找到了解决方案。我们可以使用 printInteractionController 的 PrintingItem 属性来打印文档，而不是使用 printFormatter。

printInteractionController.printFormatter = nil;
printInteractionController.printingItem = pdfData;

pdfData是pdf相关的NSData。

打印预览中未显示条形码。(Objective C)

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