NEW: Learn iOS 11 with my latest book! >>

How to run JavaScript on a UIWebView with stringByEvaluatingJavaScript(from:)

Available from iOS 2.0

You can run custom JavaScript on a UIWebView using the method stringByEvaluatingJavaScript(from:). The method returns an optional string, which means if the code returns a value you'll get it back otherwise you'll get back nil.

Here's an example that pulls out the current page's title:

let pageTitle = webView.stringByEvaluatingJavaScript(from: "document.title")

Note: if you're using a WKWebView you can use its title property directly to get the same thing.

Did this solution work for you? Please pass it on!

Other people are reading…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

Love Hacking with Swift?

Get all 40 projects in PDF and HTML: buy the Hacking with Swift book! It contains over 1300 pages of hands-on Swift coding, and will really help boost your iOS career

Click here to visit the Hacking with Swift store >>