How to get user agent using swift without using the deprecated WebView

Question

I need to get the user agent. I used to get it using UIWebView but it\'s deprecated now.

let userAgent = UIWebView().stringByEvaluatingJavaScript(from: \"naviga         


        

Answer 1

We can get the userAgent using below snippet of code,

import UIKit
import WebKit


class ViewController: UIViewController{

    var WKwebView: WKWebView!

    override func viewDidLoad() {
        super.viewDidLoad()
            getUserAgent()
    }

    func getUserAgent() {

              let webConfiguration = WKWebViewConfiguration()
       WKwebView = WKWebView(frame: .zero, configuration: webConfiguration)
             WKwebView.evaluateJavaScript("navigator.userAgent", completionHandler: { (result, error) in
                  debugPrint(result as Any)
                  debugPrint(error as Any)

                  if let unwrappedUserAgent = result as? String {
                      print("userAgent: \(unwrappedUserAgent)")
                  } else {
                      print("failed to get the user agent")
                  }
              })
    }

}

Output : userAgent: Mozilla/5.0 (iPhone; CPU iPhone OS 13_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148

Answer 2

Use WebKit instead.

import WebKit

let webView = WKWebView()
webView.evaluateJavaScript("navigator.userAgent") { (result, error) in
    print(result as! String)
}

// Output 
Mozilla/5.0 (iPad; CPU OS 13_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148