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我在文档目录中有本地 pdf 文件。WKWebview我的代码使用or调用每个来显示PDFViewer,但它只显示在 iPhone XR 模拟器上,而不显示在任何其他模拟器设备上。

任何早于 XR 的设备,都会显示错误:

libMobileGestalt MobileGestalt.c:890: MGIsDeviceOneOfType is not supported on this platform.

带有 XS、XS Max 的设备,它显示错误:

failed to open pdf ...

如代码所示。

有谁知道为什么?

我使用 Xcode 10.2。

这是我使用的代码WKWebviewer

    @IBOutlet weak var webView: WKWebView!
    //only work on XR, don't know why
    override func viewDidLoad() {
        super.viewDidLoad()

        let documentDir = FileManager.SearchPathDirectory.documentDirectory
        let userDir    = FileManager.SearchPathDomainMask.userDomainMask
        let paths      = NSSearchPathForDirectoriesInDomains(documentDir, userDir, true)
        if let dirPath = paths.first
        {

            let pdfURL = URL(fileURLWithPath: dirPath).appendingPathComponent("my file.pdf")
            do {
                //only work in Xr 
                let data = try Data(contentsOf: pdfURL)
                webView.load(data, mimeType: "application/pdf", characterEncodingName:"", baseURL: pdfURL.deletingPathExtension())
                //not working for Xs, Xs Max... later iphone
                //webView.loadFileURL(pdfURL, allowingReadAccessTo: pdfURL)
                //webView.load(URLRequest(url:pdfURL))

                //webView.loadFileURL(pdfURL, allowingReadAccessTo: pdfURL)
                print("open pdf file....")

            }
            catch {
                print("failed to open pdf \(dirPath)" )
            }
            return
        }

PDFViewer

let documentDir = FileManager.SearchPathDirectory.documentDirectory
let userDir    = FileManager.SearchPathDomainMask.userDomainMask
let paths      = NSSearchPathForDirectoriesInDomains(documentDir, userDir, true)
if let dirPath = paths.first
{

    let pdfURL = URL(fileURLWithPath: dirPath).appendingPathComponent("myfile2.pdf")

    view.addSubview(pdfView)

    pdfView.autoresizesSubviews = true
    pdfView.autoresizingMask = [.flexibleWidth, .flexibleHeight, .flexibleTopMargin, .flexibleLeftMargin]
    pdfView.displayDirection = .vertical

    //pdfView.autoScales = true

    pdfView.displayMode = .singlePageContinuous
    pdfView.displaysPageBreaks = true

    if let document = PDFDocument(url: pdfURL) {
        pdfView.document = document
    }

    pdfView.maxScaleFactor = 4.0
    pdfView.minScaleFactor = pdfView.scaleFactorForSizeToFit
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1 回答 1

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马特帮助我找出问题所在。谢谢马特。请看评论。模拟器中的每个 iOS 设备都有不同的文件夹 ID。当您下载到设备模拟器文档目录时,不要指望它会在同一文档目录中找到另一个模拟器设备。

于 2019-04-30T17:54:11.930 回答