使用 PDFKit 打印 PDF目标 C

如何解决使用 PDFKit 打印 PDF目标 C

我正在开发一个需要预览和打印文档的应用程序。 我可以预览但无法打印。

PS：我在网上搜了一下，发现有个方法printwithinfo， 但是当我尝试使用它时，它说“无法识别的方法”

这是我正在使用的代码。

PDFView *pdfView = [[PDFView alloc] initWithFrame:self.view.bounds];
    
    [self.view addSubview:pdfView];
    pdfView.translatesAutoresizingMaskIntoConstraints = NO;
    UILayoutGuide * guide = self.view.safeAreaLayoutGuide;
    [pdfView.leadingAnchor constraintEqualToAnchor:guide.leadingAnchor].active = YES;
    [pdfView.trailingAnchor constraintEqualToAnchor:guide.trailingAnchor].active = YES;
    [pdfView.topAnchor constraintEqualToAnchor:guide.topAnchor].active = YES;
    [pdfView.bottomAnchor constraintEqualToAnchor:guide.bottomAnchor].active = YES;
    
    pdfView.autoScales = YES;
    pdfView.displayDirection = kPDFdisplayDirectionVertical;
    pdfView.displaysRTL = YES;
    pdfView.displayMode = kPDFdisplaySinglePageContinuous;
    [pdfView setdisplaysPageBreaks:YES];
    [pdfView setdisplayBox:kPDFdisplayBoxTrimBox];
    NSURL *url = [[NSBundle mainBundle] URLForResource:@"sample" withExtension:@"pdf"];
    PDFDocument * document = [[PDFDocument alloc] initWithURL:url];
    pdfView.document = document;
    [pdfView.document allowsPrinting];
    
    PDFThumbnailView *thumbnailView = [[PDFThumbnailView alloc]init];
    thumbnailView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:thumbnailView];
    
    [thumbnailView.leadingAnchor constraintEqualToAnchor:guide.leadingAnchor].active = YES;
    [thumbnailView.trailingAnchor constraintEqualToAnchor:guide.trailingAnchor].active = YES;
    [thumbnailView.bottomAnchor constraintEqualToAnchor:guide.bottomAnchor constant:10].active = YES;
    [thumbnailView.heightAnchor constraintEqualToConstant:120].active = YES;
    thumbnailView.thumbnailSize = CGSizeMake(100,60);
    thumbnailView.layoutMode = PDFThumbnailLayoutModeHorizontal;
    thumbnailView.PDFView = pdfView;
    
    pdfView.delegate = self;
    pdfView.document.delegate = self;
    pdfView.displaysAsBook = YES;