Execute JavaScript from iOS? [closed]

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Let's say I have a web app which is designed for the desktop, and I want to create simple and straightforward access for iOS. Consider it a simple form with a submit button.

Some options that would be great are:

Redesigning the web interface for mobile
Creating a REST-style API for access

Unfortunately neither of these options exist, so I have to create a wrapper in iOS. I have no problems creating the basic interface, authentication, etc...but now I need to be able to simulate selection of a radio button, maybe filling in a few fields, and clicking submit.

I'd like to capture those details in a native iOS interface (already done), and submit over the wire...the only practical theory I've heard of is to collect that info, pass it to a hidden UIWebView, and execute some JavaScript from the UIWebView...but I don't see any examples here, plus I want to make certain I'm on the right path.

Any ideas?

you are getting down voted because A) you should make a native app or B) implement a mobile friendly web front end. I'm not sure what the ruling is for UIWebView wrapper apps going into the app store but thats going to be a bad UX imo. — anders
– anders, Commented Aug 24, 2015 at 19:07
You question is a little bit confusing. But you should look at WKWebviews which are/will be the replacement for UIWebViews and WebViews. Data can pass back and forth between app and WKWebviews as well as sending Javascript calls via callback to the WKWebviews a WKWebviews can do the same to the app, therefore controlling the app and any other WKWebviews in it. Have look at this to see what I mean. forums.tumult.com/t/… — markhunte
– markhunte, Commented Aug 24, 2015 at 22:11
Solved it myself, using a hidden UIWebView which calls Javascript to manipulate the page elements. — kalikkalik
– kalikkalik, Commented Aug 25, 2015 at 21:31

Community · Accepted Answer · 2017-05-23 11:43:54Z

3

Implement the UIWebView's delegate method webViewDidFinishLoad: in your UIViewController and in there you call [graphView stringByEvaluatingJavaScriptFromString:@"methodName()"]; to make sure the function gets called after the page has been loaded.

Calling Javascript using UIWebView

edited May 23, 2017 at 11:43

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answered Aug 24, 2015 at 19:03

anders

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3 Comments

kalikkalik Over a year ago

Thanks - figured it out this morning, but pretty much what I did!

anders Over a year ago

Nice work, please mark my answer as correct if it helped.

kalikkalik Over a year ago

Done; I wish the docs were more clear on this, but that's always the case!

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