Extending upon the @Prisoner's answer, if you use WKWebView you could:
let contentController:WKUserContentController = WKUserContentController()
let pauseForDebugScript = WKUserScript(source: "window.alert(\"Go, turn on Inspector, I'll hold them back!\")",
injectionTime: WKUserScriptInjectionTime.AtDocumentStart,
forMainFrameOnly: true)
contentController.addUserScript(pauseForDebugScript)
let config = WKWebViewConfiguration()
config.userContentController = contentController
//Init browser with configuration (our injected script)
browser = WKWebView(frame: CGRect(x:0, y:0, width: view.frame.width, height: containerView.frame.height), configuration:config)
also important thing is to implement alert handler from WKUIDelegate
protocol
//MARK: WKUIDelegate
func webView(webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String,
initiatedByFrame frame: WKFrameInfo, completionHandler: () -> Void) {
let alertController = UIAlertController(title: message, message: nil,
preferredStyle: UIAlertControllerStyle.Alert);
alertController.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Cancel) {
_ in completionHandler()}
);
self.presentViewController(alertController, animated: true, completion: {});
}
and one little thing just in case you could have an UIAlertController:supportedInterfaceOrientations was invoked recursively
error add following extension (From this SO Answer)
extension UIAlertController {
public override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
return UIInterfaceOrientationMask.Portrait
}
public override func shouldAutorotate() -> Bool {
return false
}
}