ios PDFKit displaymode = singlepage仅显示pdf的第一页 [英] ios PDFKit displaymode = singlepage only shows the first page of the pdf

问题描述

我试图通过苹果的PDFKit库在ios上显示pdf，而不是使用PDFDisplayMode.singlePageContinuous模式，而是想在分页符处停止，所以我尝试使用PDFDisplayMode.singlePage. https://developer.apple.com/documentation/pdfkit/pdfdisplaymode

I'm trying to display a pdf on ios via apples PDFKit library, and rather than use PDFDisplayMode.singlePageContinuous mode, I want to stop at page breaks so I'm trying to use PDFDisplayMode.singlePage. https://developer.apple.com/documentation/pdfkit/pdfdisplaymode

但是，此模式似乎仅显示pdf的一页，这是完全没有用的.我试过在页面上添加滑动处理程序，但是它们都不起作用.

However, this mode seems to only display one page of the pdf which is quite useless. I've tried adding swipe handlers to the page but they aren't working either.

我找到了示例应用程序，并更改了其代码以测试pdfdisplaymode，但遇到了相同的问题，例如 https://github.com/vipulshah2010/PDFKitDemo

I've found sample applications and altered their code to test the pdfdisplaymode but get the same problem e.g. https://github.com/vipulshah2010/PDFKitDemo

如何使用pdfkit一次实现pdfviewer的一页，从而允许在页面之间滑动?

How can I implement a one page at a time pdfviewer with pdfkit, that allows swiping between pages?!

推荐答案

另一种简单的方法是设置

A another simple way to do this is setting

pdfView.usePageViewController(true) 

这将为您添加页面之间的滑动，而无需设置自己的手势.参见下面的示例:

This adds the swiping between pages for you and no need to set up your own gestures. See example below:

override func viewDidLoad() {
    super.viewDidLoad()

    // Add PDFView to view controller.
    let pdfView = PDFView(frame: self.view.bounds)
    self.view.addSubview(pdfView)

    // Configure PDFView to be one page at a time swiping horizontally
    pdfView.autoScales = true
    pdfView.displayMode = .singlePage
    pdfView.displayDirection = .horizontal
    pdfView.usePageViewController(true)

    // load PDF
    let webUrl: URL! = URL(string: url)
    pdfView.document = PDFDocument(url: webUrl!)
}

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