Is JavaScript runnable in UIWebView?

Question

I want to change an image periodically in a UIImageView in my application, and the image will come from the web. Can I run JavaScript enabled pages in a UIWebView? Or are there any other ways to implement this?

Andiih · Accepted Answer · 2010-05-14 13:12:30Z

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I think JavaScript is the wrong approach. (You start off talking about a UIImageView - I guess that is where you want your image?) Use an NSTimer to update your image. You can easily fetch an image from a URL

http://blogs.oreilly.com/digitalmedia/2008/02/creating-an-uiimage-from-a-url.html

answered May 14, 2010 at 13:12

Andiih

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alleus · Accepted Answer · 2010-05-14 13:21:57Z

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Edit: Oh, sorry, I missed that you wanted to place the image in a UIImageView. Andiihs answer will guide you better than mine. I will keep my answer for anyone stumbling into this looking for how to run JavaScript.

Just use stringByEvaluatingJavaScriptFromString: and you have executed the JavaScript on the loaded page in your UIWebView. This scripts reads the page title and places it in the "pageTitle" variable.

NSString *pageTitle = [myWebView stringByEvaluatingJavaScriptFromString:@"document.title"];

You can also perform any methods etc...

[myWebView stringByEvaluatingJavaScriptFromString:@"doSomething('Hello!'); doSomethingElse('And again...');"];

edited May 14, 2010 at 13:21

answered May 14, 2010 at 13:10

alleus

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