在iOS 11中，有没有办法阻止拖放到WKWebView中？

import UIKit
import WebKit

class ViewController: UIViewController, UIDropInteractionDelegate {
    var webView: WKWebView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建WKWebView对象
        webView = WKWebView(frame: view.bounds)
        
        // 添加UIDropInteraction，并设置代理为self
        webView.addInteraction(UIDropInteraction(delegate: self))
        
        // 将WKWebView添加到视图中
        view.addSubview(webView)
    }
    
    // MARK: - UIDropInteractionDelegate
    
    func dropInteraction(_ interaction: UIDropInteraction, canHandle session: UIDropSession) -> Bool {
        // 返回false，阻止拖放操作
        return false
    }
    
    func dropInteraction(_ interaction: UIDropInteraction, sessionDidEnter session: UIDropSession) {
        // 拖放会话进入时的操作
    }
    
    func dropInteraction(_ interaction: UIDropInteraction, sessionDidUpdate session: UIDropSession) -> UIDropProposal {
        // 拖放会话更新时的操作
        return UIDropProposal(operation: .cancel)
    }
    
    func dropInteraction(_ interaction: UIDropInteraction, sessionDidExit session: UIDropSession) {
        // 拖放会话退出时的操作
    }
    
    func dropInteraction(_ interaction: UIDropInteraction, performDrop session: UIDropSession) {
        // 执行拖放操作时的操作
    }
    
    func dropInteraction(_ interaction: UIDropInteraction, sessionDidEnd session: UIDropSession) {
        // 拖放会话结束时的操作
    }
}