How to get the user agent on iOS?

Question

Is there a way on iOS to get the user agent of the device? I don\'t want to hard code it since I need the user agent for all devices and I need to append the user agent to a

Answer 1

(iOS 8.0, *)

Since UIWebView is deprecated in iOS 12, you should use WKWebView instead.

Since WKWebView.evaluateJavaScript(_:) result is now async, this implementation solve a common requirement to have userAgent available in your own REST api call.

import WebKit

class UAString {

    static var userAgent : String = ""

    @discardableResult init(view parent: UIView) {

        if UAString.userAgent.isEmpty {

            let webView = WKWebView(frame: .zero, configuration: WKWebViewConfiguration())

            webView.translatesAutoresizingMaskIntoConstraints = false
            parent.addSubview(webView)

            webView.evaluateJavaScript("navigator.userAgent") { result, _ in
                UAString.userAgent = result as? String ?? ""
            }
        }
    }

}

Now last part you can implement this class in your initial view controller as follow:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    UAString(view: self.view)
}

then you can access the attribute as UAString.userAgent