如何解决我需要构建pdf查看器,但要使用2个指向pdfs文件的网址
我尝试将两个pdf urls文件合并到一个PDFView。
import Foundation
import PDFKit
protocol PdfViewDelegate: class {
func heightDidReccived(height:CGFloat)
}
class PdfView: YITStoryboardCustomXibView {
weak var delegate: PdfViewDelegate?
@IBOutlet weak var pageNumbersLabel: UILabel!
@IBOutlet weak var showThumbnailButton: UIButton!
@IBOutlet weak var pdfViewContainer: UIView!
@IBOutlet weak var thumbnailViewContainer: UIView!
@IBOutlet weak var pageNumbersView: UIView!
@IBOutlet weak var pdfViewContainerHeight: NSLayoutConstraint!
@IBOutlet weak var thumbnailViewHeightConstraint: NSLayoutConstraint!
var pdfView = PDFView()
var subData = Data()
let pageCount = 1
var pageReturnCount = 0
override func awakeFromNib() {
super.awakeFromNib()
}
override func layoutSubviews() {
pdfScaleFactor()
}
override func xibName() -> String {
return "PdfView"
}
func openPdf(url: String) {
let webService = WebService()
webService.delegate = self
webService.getRequestFor(url: "http://www.orimi.com/pdf-test.pdf")
let webService1 = WebService()
webService1.delegate = self
webService1.getRequestFor(url: "http://www.pdf995.com/samples/pdf.pdf")
}
func getUrl(name:String) -> URL{
let resourceDocPath = (FileManager.default.urls(for: .documentDirectory,in: .userDomainMask)).last! as URL
return resourceDocPath.appendingPathComponent("\(name).pdf")
}
func configurPdfView(data:Data){
self.pdfView = PDFView()
if let document = PDFDocument(data: subData) {
pdfView.autoresizesSubviews = true
pdfView.autoresizingMask = [.flexibleWidth,.flexibleHeight,.flexibleTopMargin,.flexibleLeftMargin]
pdfView.displayDirection = .horizontal
pdfView.autoScales = true
pdfView.displaysRTL = true
pdfView.displayMode = .singlePageContinuous
pdfView.document = document
pdfView.backgroundColor = .clear
pdfViewContainer.addViewWithConstraint(view: pdfView,toView: pdfViewContainer)
pdfView.usePageViewController(true,withViewOptions:["interPageSpacing": -50])
pdfViewContainer.layer.masksToBounds = false
pdfViewContainer.layer.shadowOffset = CGSize(width: 0,height: 7)
pdfViewContainer.layer.shadowRadius = 10
pdfViewContainer.layer.shadowOpacity = 0.16
}
}
@IBAction func showThumbnailView(_ sender: Any) {
}
private func pdfScaleFactor(){
pdfView.minScaleFactor = pdfView.scaleFactorForSizeToFit
}
@objc func updatePageChange() {
if let pageNumber = pdfView.currentPage?.pageRef?.pageNumber,let total = pdfView.document?.pageCount {
pageNumbersLabel.text = "\(pageNumber) מתוך \(total)"
}
}
}
extension PdfView : WebServiceDelegate {
func didReceiveData(data: Data) {
print("subData 1\(data.count)\n")
print("subData 2\(subData.count)\n")
subData.append(data)
if pageCount != pageReturnCount {
pageReturnCount = pageReturnCount + 1
}else{
DispatchQueue.main.async {
self.configurPdfView(data: self.subData)
}
}
}
}
类WebService
class WebService: NSObject {
weak var delegate: WebServiceDelegate?
func getRequestFor(url:String) {
print("getRequestFor : \(url) \n")
if WebService.isConectedToInternet(){
AF.request(url,method:.get)
.response { response in
if let data = response.data {
DispatchQueue.global(qos: .background).async {
self.delegate?.didReceiveData(data: data)
}
}
}
}
}
首先我要尝试:
但是PDFView总是加载最后一个pdf文件,而不是合并file1和file2,我看到合并data1和data2之后数据更大。
秒:
我尝试合并两个PDFDocument,但仍然无法正常工作。
我做错了什么?可以做类似的事情吗?
解决方法
将data1
和data2
转换为PDF实例后,即可使用此功能:
func combinePdf(data1: Data,data2: Data) -> PDFDocument {
let pdfDocument = PDFDocument(data: data1)!
let otherPdfDocument = PDFDocument(data: data2)!
let newPdfDocument = PDFDocument()
for p in 0..<pdfDocument.pageCount {
let page = pdfDocument.page(at: p)!
newPdfDocument.insert(page,at: newPdfDocument.pageCount)
}
for q in 0..<otherPdfDocument.pageCount {
let page = otherPdfDocument.page(at: q)!
newPdfDocument.insert(page,at: newPdfDocument.pageCount)
}
return newPdfDocument
}
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