如何在ios中从url读取pdf文件

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let webView = UIWebView(frame: view.bounds)
        view.addSubview(webView)
        
        if let pdfURL = URL(string: "https://example.com/example.pdf") {
            let request = URLRequest(url: pdfURL)
            webView.loadRequest(request)
        }
    }
}

import UIKit
import WebKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let webView = WKWebView(frame: view.bounds)
        view.addSubview(webView)
        
        if let pdfURL = URL(string: "https://example.com/example.pdf") {
            let request = URLRequest(url: pdfURL)
            webView.load(request)
        }
    }
}