如何在iOS阅读器的本地存储中显示pdf文件

import PDFKit

func displayPDF() {
    // 获取PDF文件路径
    let pdfPath = Bundle.main.path(forResource: "example", ofType: "pdf")
    
    // 将PDF文件保存到本地存储
    let fileManager = FileManager.default
    let documentsDirectory = fileManager.urls(for: .documentDirectory, in: .userDomainMask)[0]
    let destinationURL = documentsDirectory.appendingPathComponent("example.pdf")
    
    do {
        try fileManager.copyItem(at: URL(fileURLWithPath: pdfPath!), to: destinationURL)
    } catch {
        print("Error copying PDF file: \(error)")
        return
    }
    
    // 显示PDF文件
    let pdfDocument = PDFDocument(url: destinationURL)
    let pdfView = PDFView(frame: CGRect(x: 0, y: 0, width: 320, height: 480))
    pdfView.document = pdfDocument
    
    // 将pdfView添加到视图中显示
    // ...
}