UIWebViewにUserAgentをつけて表示を変えたい…!

Apple does not support it and add it as Default, so we have to declare it in AppDelegate, which means we are supposed to call following function before creating WebView

Development Environment

• OS X El Captain 10.11.2
• Xcode Version 8.0

Language

Swift 3.0

Step

1 Add below code in AppDelegate.swift

AppDelegate.swift

private func setupCustomUserAgent() {
        //UserAgentを上書き
        let webView:UIWebView = UIWebView()
        webView.frame = CGRect.zero
        let userAgent:String! = webView.stringByEvaluatingJavaScript(from: "navigator.userAgent")
        let userAgentStr = "QiitaLaw"
        let customUserAgent:String = userAgent.appending(userAgentStr)
        let dic:NSDictionary = ["UserAgent":customUserAgent]
        UserDefaults.standard.register(defaults: dic as! [String : AnyObject])
    }

2 Call that function in following

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        setupCustomUserAgent()
        return true
    }

3 Done