using Javascript in Objective-C

Question

How to use following javascript code in Objective-C ?

var theFormId = $('form').filter(function() {
return this.innerHTML.indexOf('forgot your password') != -1;
}).attr('id');

HOw to use code above in UIWebView's stringByEvaluatingJavaScriptFromString: method ?

I used the code above with Objective-C as follows:

NSString *formID = [NSString stringWithFormat:@"%@",[self.browser stringByEvaluatingJavaScriptFromString:@"$('form').filter (function() {var text = this.innerHTML.toLowerCase();" 
                        "return text.indexOf('forgot your password') != -1 || "
                        "text.indexOf('remember me') != -1;}).attr('id');"] ];

When trying to log formID , it prints nothing. Is there any syntax error in my code ?

Please refer to the related question [here][1] this will help you a lot [1]: stackoverflow.com/questions/766627/… — The iOSDev
– The iOSDev, Commented Apr 9, 2012 at 8:09
@AalokParikh to use links in comments you need to use this format [text](http://URL) — Zelda
– Zelda, Commented Apr 10, 2012 at 14:44

mttrb · Accepted Answer · 2012-04-09 08:00:55Z

2

I have no idea if this will work because you have only given a very small part of your problem.

Firstly, your Javascript doesn't look like it is valid. I suspect it should be:

var theFormId = $('form').filter(function() {
    var text = this.innerHTML.toLowerCase(); 

    return text.indexOf('forgot your password') != -1 || 
           text.indexOf('remember me') != -1;
});

I added some closing brackets.

To run this Javascript using -stringByEvaluatingJavaScriptFromString: you would do something like the following.

NSString *javascript = @"var theFormId = $('form').filter(function() { var text = this.innerHTML.toLowerCase(); return text.indexOf('forgot your password') != -1 || text.indexOf('remember me') != -1; });";

NSString *result = [webView stringByEvaluatingJavaScriptFromString:javascript];

I'm not sure what you'll get in the result string when you run this though.

answered Apr 9, 2012 at 8:00

mttrb

8,3433 gold badges37 silver badges57 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Manish Verma Over a year ago

Please to go to my original question at here : stackoverflow.com/questions/10069564/…

Collectives™ on Stack Overflow

using Javascript in Objective-C

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related