I found a lots of ways to call objective-c code from javascript, but I want to call the javascript code from objective-c. Last time I submitted a HTML FORM from objective-c, and now I wan't to call a javascript method. What do you think, is there any way to call it and get the response? I am interested in any solution, but I started to think and I think I need to send a html call or something like this, but I am not sure about this because the javascript is client side code, so maybe I need to process it from my objective-c code. What do you think about this?
asked Mar 17, 2010 at 15:49
Infinite Possibilities
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2 Answers
Are you looking for UIWebView's stringByEvaluatingJavaScriptFromString: method?
This lets you run JS code inside of the sandbox of a web view, from Objective-C.
1 Comment
Infinite Possibilities
Look my comment at ExitToShell's answer. And thanks for you too. :)
Sounds like you are using a WebKit embedded in your app to link JavaScript to your "native" Obj-C code right?
If so you simply do this:
NSString* script = @"function __wrapper() { return (typeof webNodeEvent == \"function\") } __wrapper();";
id resultObj = [nodeScriptObject evaluateWebScript:script];
if ([resultObj boolValue]) { // its there, call it
[nodeScriptObject callWebScriptMethod:@"webNodeEvent" withArguments:[NSArray arrayWithObject:eventType]];
}
The nodeScriptObject is from the WebView and is just the JavaScript object.
2 Comments
Infinite Possibilities
That's very cool. I didn't imagine that it is as simple as you too said. Thanks a lot guys. I'll try each two methods then I will replay with answer here.
MJVDM
i don't understand where you have the script file etc. could you please elaborate the above code a bit more? thx a lot!