如何在MACOS中使用PDFActionGoto将具有PDFPage操作类型的链接注释添加到PDFPage中

Question

我一直在尝试向我的PDFPage添加一个链接注释，这样一旦单击它，它就会带我到下一页的特定位置。这就是我正在尝试的方式，但我的代码不起作用：

occur.

• .freetext

• 光标不会更改为指针样式。单击该区域后，

• 导航不再显示。

我希望能在这方面提供任何帮助。这几天我一直在尝试。我使用的是最新版本的xcode (12和Swid5.3)

    let docDirectoryPath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]


    let pdfDocument = PDFDocument()
    let page1 = PDFPage()
    let page2 = PDFPage()
    pdfDocument.insert(page1, at: 0)
    pdfDocument.insert(page2, at: 1)
    
    let textAnnotation = PDFAnnotation(bounds: NSRect(x: 200, y: 1000, width: 600, height: 25), forType: .freeText, withProperties: nil)
    textAnnotation.contents = "Click me to go to the next page"
    
    let linkAnnotation = PDFAnnotation(bounds: NSRect(x: 200, y: 1000, width: 600, height: 25), forType: .link, withProperties: nil)
    linkAnnotation.action = PDFActionGoTo(destination: PDFDestination(page: page2, at: NSPoint(x: 200, y: 1000)))
    linkAnnotation.shouldDisplay = true
    linkAnnotation.shouldPrint = true

    let someText = PDFAnnotation(bounds: NSRect(x: 200, y: 1000, width: 600, height: 25), forType: .freeText, withProperties: nil)
    someText.contents = "This is the desitnation of link annotation"

    page1.addAnnotation(textAnnotation)
    page1.addAnnotation(linkAnnotation)
    page2.addAnnotation(someText)

    
    let printOpts: [NSPrintInfo.AttributeKey: Any] = [NSPrintInfo.AttributeKey.jobDisposition: NSPrintInfo.JobDisposition.preview, NSPrintInfo.AttributeKey.jobSavingURL: docDirectoryPath]
    
    let printInfo = NSPrintInfo(dictionary: printOpts)
    printInfo.horizontalPagination = NSPrintInfo.PaginationMode.automatic
    printInfo.verticalPagination = NSPrintInfo.PaginationMode.automatic
    printInfo.topMargin = 0.0
    printInfo.leftMargin = 0.0
    printInfo.rightMargin = 0.0
    printInfo.bottomMargin = 0.0
    printInfo.isHorizontallyCentered = true
    printInfo.isVerticallyCentered = false
    printInfo.paperSize = NSSize(width: 8.5*96, height: 11*96)
    printInfo.scalingFactor =  1.0
    let printOperation = pdfDocument.printOperation(for: printInfo, scalingMode: .pageScaleNone, autoRotate: false)!
    printOperation.showsPrintPanel = true
    printOperation.run()

Answer 1

经过多次尝试和错误之后，我认为如果文档是通过printOperation运行的，那么linkAnnotation就不会被保留。因此，我使用“保存面板”将文档保存为文件。如果你点击第一页的绿色区域，它将带你到第二页(目的地到达)。

    import Foundation
    import PDFKit 
    
    let page1 = PDFPage()
    let page2 = PDFPage()
    
    let link = PDFAnnotation(bounds: NSRect(x: 40, y: 750, width: 200, height: 30), forType: .link, withProperties: nil)
    let highlight = PDFAnnotation(bounds: NSRect(x: 40, y: 750, width: 200, height: 30), forType: .highlight, withProperties: nil)
    highlight.color = .green
    highlight.backgroundColor = .red
    
    let text = PDFAnnotation(bounds: NSRect(x: 40, y: 400, width: 200, height: 30), forType: .freeText, withProperties: nil)
    text.contents = "Destination Arrived!"
    link.action = PDFActionGoTo(destination: PDFDestination(page: page2, at: NSPoint(x: 40, y: 430)))
    
    page1.addAnnotation(highlight)
    page1.addAnnotation(link)
    
    page2.addAnnotation(text)
    
    let pdfDoc = PDFDocument()
    pdfDoc.insert(page1, at: 0)
    pdfDoc.insert(page2, at: 1)
    
    let savePanel = NSSavePanel()
    savePanel.title = NSLocalizedString("Save file", comment: "enableFileMenuItems")
    savePanel.nameFieldStringValue = "LinkAnnotation.pdf"
    savePanel.prompt = NSLocalizedString("Save", comment: "enableFileMenuItems")
    savePanel.allowedFileTypes = ["pdf"]
    let fileManager = FileManager.default
    savePanel.begin() { (result2) -> Void in
        if result2 == NSApplication.ModalResponse.OK {
            let fileWithExtensionURL = savePanel.url!
            if fileManager.fileExists(atPath: fileWithExtensionURL.path) {
            } else {
                pdfDoc.write(to: fileWithExtensionURL)
            }
        }
    }