生成PDF，但在swift ios的webView中未检索到文件

Posted 2023-02-23

【中文标题】生成PDF，但在swift ios的webView中未检索到文件

【英文标题】：PDF is generated but file not retrieved in a webView in swift ios

【发布时间】：2018-01-22 09:56:34

【问题描述】：

我正在生成 UIView 的 PDF 并在 myforms 中存储名称，正在生成 PFD 并且控制台打印 PDF 可用，但它在 VC 中只显示白屏

这就是我正在做的事情：

我有这个代码来生成 PDF

   @IBAction func createAct(_ sender: Any) 
    print("Creat PDF")
    self.createPdfFromView(mainView: mainView, saveToDocumentsWithFileName: "myforms")



func createPdfFromView(mainView: UIView, saveToDocumentsWithFileName fileName: String)

    let pdfData = NSMutableData()
    UIGraphicsBeginPDFContextToData(pdfData, mainView.bounds, nil)
    UIGraphicsBeginPDFPage()

    guard let pdfContext = UIGraphicsGetCurrentContext() else  return 

    mainView.layer.render(in: pdfContext)
    UIGraphicsEndPDFContext()

    if let documentDirectories = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first 
        let documentsFileName = documentDirectories + "/" + fileName
        debugPrint(documentsFileName)
        pdfData.write(toFile: documentsFileName, atomically: true)
    

然后我在控制台中有这个：

创建 PDF

"/Users/jawaidahmed/Library/Developer/CoreSimulator/Devices/3F95BE09-0F25-427C-9ED9-4BDB16DC3600/data/Containers/Data/Application/1EC22FBC-79E7-4AC5-BB7D-13783CC34516/Documents/myforms"

我正在使用这个PDFViewController 在 web 视图中检索文件

override func viewDidLoad() 
super.viewDidLoad()

       let check = "myforms"

    var pdfURL = (FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)).last! as URL

    print("check final = \(pdfURL)")

    pdfURL = pdfURL.appendingPathComponent(check) as URL



    if let pdfBundleURL = Bundle.main.url(forResource: "myforms", withExtension: nil, subdirectory: nil)  




        do 

            let data = try Data(contentsOf: pdfBundleURL)



            //Lastly, write your file to the disk.

            try data.write(to: pdfURL, options: .atomicWrite)



        

        catch 

            // catch errors here

        

    



    do

        let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String

        let url = URL(fileURLWithPath: path)

        var filePath = url.appendingPathComponent(check).path

        let fileManager1 = FileManager.default

        if fileManager1.fileExists(atPath: filePath) 

            print("FILE AVAILABLE in VC")

            filePath = "file://\(filePath)"

            let fileUrlkk = Foundation.URL(string: filePath)

            let data = try Data(contentsOf: fileUrlkk!)

            self.webView.load(data, mimeType: filePath, textEncodingName:"utf-8", baseURL: pdfURL.deletingLastPathComponent())

         else 

            print("FILE NOT AVAILABLE in VC")

        

    

    catch let error as NSError 

        print("An error took place: \(error)")

    

我在控制台中收到了这个： FILE AVAILABLE in VC

这意味着文件已生成并且可用，但它只显示空的VC白色背景

【问题讨论】：

执行后filePath是什么：var filePath = url.appendingPathComponent(check).path?

当您保存文档时，您没有编写扩展名“.pdf”。

@Alexkater 那我该怎么做

@iosDeveloper 在这一行 self.createPdfFromView(mainView: mainView, saveToDocumentsWithFileName: "myforms.pdf")

@Alexkater 它不工作亲爱的！

【参考方案1】：

self.webView.load(data, mimeType: "application/pdf", textEncodingName:"utf-8", baseURL: pdfURL.deletingLastPathComponent())

替换 textEncodingName:""

与

textEncodingName:"utf-8"

检查一下

【参考方案2】：

尝试在 Webview 中加载。我尝试使用您的示例。它有效

let FileName = "myforms"   
let Filemanager = NSFileManager.defaultManager()  
let docURL = Filemanager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0] as NSURL  
print(docURL)   
let pdfPATH = docURL.URLByAppendingPathComponent(FileName)        
print(pdfPATH)           
let data = NSData(contentsOfURL: pdfPATH)  
WBview.loadData(data!, MIMEType: "application/pdf", textEncodingName: "utf-8", baseURL: pdfPATH.URLByDeletingLastPathComponent!)