Ios Swift应用程序：安装应用程序后继续线程

正在尝试在应用程序启动时触发deeplink。如果未安装应用程序，请安装它，然后启动deeplink。似乎无法确定如何配置完成处理程序来执行此操作：

import UIKit
import StoreKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        guard let url = URL(string: "salesforce1://sObject/-----------/view") else {
                return
            }
        
        if UIApplication.shared.canOpenURL(url) {
            // deep link to Einstein
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        }
        else {
            // app store if not installed
            let vc = SKStoreProductViewController()
            vc.loadProduct(withParameters: [SKStoreProductParameterITunesItemIdentifier: NSNumber(value: 404249815)], completionBlock: nil)
            present(vc, animated: true) \\\ Should it go here? as completion: {() UIApplication.shared.open(url, options: [:], completionHandler: nil) }
        }
    }
}