我正在开发一个使用PDFKit显示PDF的应用程序，我需要能够设置最小缩放级别-否则用户可以永远缩小。我尝试设置minScaleFactor和maxScaleFactor，因为它们会关闭autoScales，所以我需要将scaleFactor设置为pdfView.scaleFactorForSizeToFit。然而，此设置不会产生与autoScales相同的起始缩放比例，尽管更改了实际的scaleFactor数值，起始缩放比例也不会更改。此照片是在autoScales打开时拍摄的：[！[打开自动缩放的图像][1]][1]
当我使用scaleFactorForSizeToFit时会发生什么[！[具有缩放因子的图像适合大小][2]][2]
要引用scaleFactorForSizeToFit的apple文档，请参阅
autoScales将用于缩放当前文档和版面的“大小适合”缩放因子。
我已经把我的代码贴在下面了。谢谢你的帮助。

import PDFKit
import SwiftUI
import Combine

class DataLoader : ObservableObject {
    @Published var data : Data?
    var cancellable : AnyCancellable?
    
    func loadUrl(url: URL) {
        cancellable = URLSession.shared.dataTaskPublisher(for: url)
            .map { $0.data }
            .receive(on: RunLoop.main)
            .sink(receiveCompletion: { (completion) in
                switch completion {
                case .failure(let failureType):
                    print(failureType)
                    //handle potential errors here
                case .finished:
                    break
                }
        }, receiveValue: { (data) in
            self.data = data
        })
    }
}

struct PDFSwiftUIView : View {
    @StateObject private var dataLoader = DataLoader()
    var StringToBeLoaded: String
    
    var body: some View {
        VStack {
            if let data = dataLoader.data {
                PDFRepresentedView(data: data)
                    .navigationBarHidden(false)
            } else {
                CustomProgressView()
                   //.navigationBarHidden(true)
            }
        }.onAppear {
            dataLoader.loadUrl(url: URL(string: StringToBeLoaded)!)
        }
    }
}

struct PDFRepresentedView: UIViewRepresentable {
    typealias UIViewType = PDFView
    
    let data: Data
    let singlePage: Bool = false
    
    func makeUIView(context _: UIViewRepresentableContext<PDFRepresentedView>) -> UIViewType {
        let pdfView = PDFView()
        
        
     
       // pdfView.autoScales = true
       // pdfView.maxScaleFactor = 0.1
      
        pdfView.minScaleFactor = 1
        pdfView.scaleFactor = pdfView.scaleFactorForSizeToFit
        pdfView.maxScaleFactor = 10
        
       
        if singlePage {
            pdfView.displayMode = .singlePage
        }
        return pdfView
    }
    
    func updateUIView(_ pdfView: UIViewType, context: UIViewRepresentableContext<PDFRepresentedView>) {
        pdfView.document = PDFDocument(data: data)
    }
    func canZoomIn() -> Bool {
           return false
       }
}

struct ContentV_Previews: PreviewProvider {
    static var previews: some View {
        PDFSwiftUIView(StringToBeLoaded: "EXAMPLE_STRING")
            .previewInterfaceOrientation(.portrait)
    }
}