PDF编辑器/在SwiftUI中绘制PDF

Question

我正在寻找一个在SwiftUI应用程序中查看和编辑PDF文件的解决方案。最重要的是，应该赋予它签署PDF/使用它的功能。有办法这样做吗？我是Swift开发的新手，所以我同时学习SwiftUI / UIKit。因此，我很难用UIKit编写SwiftUI代码的包装器。“我的代码”可以显示PDF，但到目前为止无法编辑：

import Foundation
import SwiftUI
import UIKit
import PDFKit


struct PDFKitView: View {
    var url: URL
    var body: some View {
        PDFKitRepresentedView(url)
    }
}

struct PDFKitRepresentedView: UIViewRepresentable {
    let url: URL
    
    init(_ url: URL) {
        self.url = url
        
    }

    func makeUIView(context: UIViewRepresentableContext<PDFKitRepresentedView>) -> PDFKitRepresentedView.UIViewType {
        let pdfView = PDFView()
        
        pdfView.document = PDFDocument(url: self.url)
        pdfView.autoScales = true
        
        return pdfView
    }

    func updateUIView(_ uiView: UIView, context: UIViewRepresentableContext<PDFKitRepresentedView>) {
        // Update the view.
    }
}

Answer 1

我已经找到解决办法了。我使用了PDFFreedraw回购从ClassicalDude在GitHub上。这是一个实现良好的开源解决方案。那时，我能够为像这样的快速UI编写一个包装器。

https://github.com/ClassicalDude/pdfView-Freedraw

示例截图

import Foundation
import SwiftUI
import UIKit
import PDFKit


struct PDFKitEditorView: View {
    var url: URL
    var body: some View {
        PDFKitEditorRepresentedView(url)
            .ignoresSafeArea(.all)
            .navigationBarHidden(true)
    }
}

struct PDFKitEditorRepresentedView: UIViewControllerRepresentable {
    
    let url: URL
    
    init(_ url: URL) {
        self.url = url
    }
    
    func makeUIViewController(context: Context) -> UIViewController {
        
        let storyboard = UIStoryboard(name: "MainPDFView", bundle: Bundle.main)
        let controller = storyboard.instantiateViewController(withIdentifier: "PDFViewControllerID") as? PDFViewController
        controller!.url = self.url
        
        return controller!
    }
    
    func updateUIViewController(_ uiViewController: UIViewController, context: Context) {
        
    }
    
   
}