Swift如何为网页承载页面添加更多功能详解

class WebViewController: UIViewController,UIWebViewDelegate{
 let spinner = UIActivityIndicatorView()
 @IBOutlet weak var WebView: UIWebView!

 @IBAction func CloseAction(_ sender: Any) {
  self.dismiss(animated: true, completion: nil)
 }

 @IBAction func SafariAction(_ sender: Any) {
  self.toSafari()
 }

 @IBAction func CopyAction(_ sender: Any) {
  self.toCopy()
 }

 @IBAction func MoreAction(_ sender: Any) {
  self.toMore()
 }

override func viewDidLoad() {
  super.viewDidLoad()
  //菊花按钮
  spinner.activityIndicatorViewStyle = .gray
  spinner.center = view.center
  spinner.hidesWhenStopped = true
  view.addSubview(spinner)
  spinner.startAnimating()

  self.loadWeb()
  // Do any additional setup after loading the view.
}

func webViewDidFinishLoad(_ webView: UIWebView) {
  print("web load finish")
  self.spinner.stopAnimating()
 }

@objc func toSafari(){
  print("to safari")
  if let url = NSURL(string:self.url) {
   UIApplication.shared.open(url as URL, options: [:], completionHandler: nil)
  }
}

@objc func toCopy(){
  print("to copy")
  //就这两句话就实现了
  let paste = UIPasteboard.general
  let str = self.urlTitle+":"+self.url
  print(str)
  paste.string = str
  let alertController = UIAlertController(title: NSLocalizedString("Copy Success!",comment: "Copy Success!"),message: nil,preferredStyle: .alert)
  //显示提示框
  self.present(alertController, animated: true, completion: nil)
  //两秒钟后自动消失
  DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 2) {
   self.presentedViewController?.dismiss(animated: false, completion: nil)
  }
}

@objc func toMore(){
  print("to more")
  let shareVC:UIActivityViewController = UIActivityViewController(activityItems: [self.urlTitle,self.urlImage,self.url], applicationActivities: nil)
  self.present(shareVC, animated: true, completion: {
   print("more success")
  })
 }