iOS:从UIWebView分享链接打开Facebook原生应用

import UIKit
import FBSDKShareKit

class ViewController: UIViewController, UIWebViewDelegate {
    
    @IBOutlet weak var webView: UIWebView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        webView.delegate = self
        
        // 加载网页
        let url = URL(string: "https://example.com")
        let request = URLRequest(url: url!)
        webView.loadRequest(request)
    }
    
    func webView(_ webView: UIWebView, shouldStartLoadWith request: URLRequest, navigationType: UIWebView.NavigationType) -> Bool {
        // 捕获UIWebView加载的请求
        
        if let url = request.url, url.scheme == "share" {
            // 如果是分享链接的请求，执行分享操作
            
            let sharedLink = url.absoluteString.replacingOccurrences(of: "share://", with: "")
            
            // 创建分享内容
            let content = FBSDKShareLinkContent()
            content.contentURL = URL(string: sharedLink)
            
            // 展示分享对话框
            let dialog = FBSDKShareDialog()
            dialog.fromViewController = self
            dialog.shareContent = content
            dialog.mode = .native
            dialog.show()
            
            return false
        }
        
        return true
    }
}