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Send parameters to a local file in a UIWebView

Answer 1

+2 A:

No, unfortunately not.

You can, however, get around this by setting variables and calling functions / methods in JavaScript using the UIWebView:stringByEvaluatingJavaScriptFromString:

groundhog 2009-08-04 11:58:57

I've got a javascript function defined in the local html file. I can load that file, but, how could I call a javascript function inside that file? I need an example.

Hectoret 2009-08-04 12:38:17

[webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"myJavascriptFunction(%f);", 1.0f]];

rpetrich 2009-08-04 15:01:39

Did you get that to work? Does the myJavascriptFunction function get called? In my code it doesn't... how can I check for sure if the call it's being done?

Hectoret 2009-08-04 16:59:42

Answer 2

+2 A:

You are loading the HTML from your own bundle which implies you have full control over it. Why not just parameterize the HTML with the fields you want. You could easily add in some hidden input fields that your javascript could then access. Say your HTML looked like this:

<body>
<form>
Static Field 1: <input type="text" name="field1"><br>
Static Field 2: <input type="text" name="field2"><br>
%@
</form>
</body>

Now just read this data into a string and format the %@ with some hidden fields like this:

NSString *input = @"<input type=\"hidden\" name=\"field3\"><br>";
NSString *formatted = [NSString stringWithFormat:html, input];

Then call -loadHTMLString: in the webview.

[webView loadHTMLString:formatted baseURL:nil];

Is there any reason you couldn't do it that way. Now your javascript can grab the value of the hidden input field with a call to:

document.getElementsByName('field3')[0].value;

Matt Long 2009-08-04 18:26:38

Answer 3

+2 A:

You can insert in your local html-file a javascript to parse the GET-request

<script language="javascript">
function getget(name) {
     var q = document.location.search;
     var i = q.indexOf(name + '=');

     if (i == -1) {
      return false;
     }

     var r = q.substr(i + name.length + 1, q.length - i - name.length - 1);

     i = r.indexOf('&');

     if (i != -1) {
      r = r.substr(0, i);
     }

     return r.replace(/\+/g, ' ');
    }
</script>

Use getget('parameter_name') to get the parameter from request string.

Pavel Yakimenko 2009-10-16 11:15:15

Answer 4

A:

Then call -loadHTMLString: in the webview.

I believe he was avoiding using loadHTMLString instead of loadRequest because it breaks back and forward buttons of the UIWebView

jpmartineau 2010-01-13 18:27:40

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Send parameters to a local file in a UIWebView

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