iOS应用内实现跳转到手机淘宝天猫的方法

 func copyStrKey(_ sender: UIButton) {
  let pboard = UIPasteboard.general
  pboard.string = self.productModel["search_key"].stringValue  
  var titleStr = ""
  var jumpStr = ""
  if sender.tag == 0 {
   titleStr = "关键词复制成功，是否跳转到手机淘宝APP？"
   jumpStr = ("taobao://s.taobao.com/search?q=" + self.productModel["search_key"].stringValue).addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
  } else if sender.tag == 1 {
   titleStr = "淘口令复制成功，是否跳转到手机淘宝APP？"
   jumpStr = "taobao://item.taobao.com/item.htm"
  }  
  let alertCtr = UIAlertController.init(title: titleStr, message: nil, preferredStyle: UIAlertControllerStyle.alert)
  alertCtr.addAction(UIAlertAction.init(title: "取消", style: UIAlertActionStyle.cancel, handler: nil))
  alertCtr.addAction(UIAlertAction.init(title: "确定", style: UIAlertActionStyle.default, handler: { (action) in   
   if let url = URL.init(string: jumpStr) {    
    if UIApplication.shared.canOpenURL(url) == true {
     UIApplication.shared.openURL(url)
    } else {     
     let alertC = UIAlertController.init(title: "您未安装手机淘宝APP,是否前往AppStore下载安装？", message: nil, preferredStyle: UIAlertControllerStyle.alert)     
     alertC.addAction(UIAlertAction.init(title: "取消", style: UIAlertActionStyle.cancel, handler: nil))
     alertC.addAction(UIAlertAction.init(title: "确定", style: UIAlertActionStyle.default, handler: { (action: UIAlertAction) in      
      let AppStoreVC = UIViewController.init()      AppStoreVC.modalTransitionStyle = UIModalTransitionStyle.coverVertical
      
      let webView = UIWebView.init(frame: AppStoreVC.view.bounds)
      let request = NSURLRequest.init(url: URL.init(string: "itms-apps://itunes.apple.com/cn/app/tao-bao-sui-shi-sui-xiang/id387682726?mt=8")!) //AppStore手机淘宝地址
      webView.loadRequest(request as URLRequest)
      AppStoreVC.view.addSubview(webView)      
      self.present(AppStoreVC, animated: true, completion: {
       AppStoreVC.dismiss(animated: true, completion: nil)
      })
     }))
     self.present(alertC, animated: true, completion: nil)     
    }
   }
  }))
  self.present(alertCtr, animated: true, completion: nil)
 }