UIWebView and JavaScriptInterface in Swift

Question

How can I to create the JavascriptInterface channel from my web site to my UIWebView?

Example in Android:

webView.addJavascriptInterface(new WebAppIn         


        

Answer 1

Here's a quick example:

1. Register a URL Scheme such as foobar in Xcode

2. Handle this URL Scheme in your web view

   func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
       if request.URL?.query?.containsString("show_activity_indicator=true") {
           myActivityIndicator.startAnimating()
       }
   }
   

3. Finally, call this from your JavaScript

   // Show your activity indicator from JavaScript.
   window.location = "foobar://fizz?show_activity_indicator=true"
   

Note: See my question here for more information on web view communication in iOS.