Helper method to open a safari view in app. Don't forget to import the SafariServices framework in 'Project' > 'Linked Frameworks'.

Safari.swift

import SafariServices

var safariViewController: SFSafariViewController?

extension ViewController: SFSafariViewControllerDelegate {
    
    func safariViewController(_ controller: SFSafariViewController, didCompleteInitialLoad didLoadSuccessfully: Bool) {
        if !didLoadSuccessfully {
            // check if online
            print("couldn't open safari view")
        }
    }
    
    func presentSafari(withLink link: URL, completion: @escaping () -> Void) {
        self.safariViewController = SFSafariViewController(url: link)
        self.safariViewController?.delegate = self
        guard let webViewController = self.safariViewController else { return }
        self.present(webViewController, animated: true, completion: completion)
    }
}