如何使用PDFView内置的PageViewController进行双击放大？

import PDFKit

let pdfView = PDFView(frame: view.bounds)
view.addSubview(pdfView)

if let url = Bundle.main.url(forResource: "example", withExtension: "pdf") {
    if let document = PDFDocument(url: url) {
        pdfView.document = document
    }
}

let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap(_:)))
doubleTapGesture.numberOfTapsRequired = 2
pdfView.addGestureRecognizer(doubleTapGesture)

@objc func handleDoubleTap(_ gestureRecognizer: UITapGestureRecognizer) {
    let location = gestureRecognizer.location(in: pdfView)
    let scaleFactor = pdfView.scaleFactorForSizeToFit
    pdfView.scaleFactor = pdfView.scaleFactor * scaleFactor
    pdfView.setNeedsDisplay()
}