Question

I am 1 week into “brand new” to iOS. I am using x-code to create a view based app. Now using a web view I need to pull a variable from a hidden tag on the webpage and send it to native code. So how do I do this:

xmlhttp=new XMLHttpRequest();

xmlhttp.onreadystatechange=function()
{
    if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
        document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
      **this varSendText**
        varSendText = document.getElementById("sendtextcoupon").value;
        if (varSendText == "1")..........

That is the goal but obviously not the way.

Answer 1

Use the stringByEvaluatingJavaScriptFromString: method of the UIWebView.

NSString *varSendText = [webView stringByEvaluatingJavaScriptFromString:@"return varSendText;"];

Just make sure the variable is global and the AJAX response has been received. You can also check this by using the above method and simple Javascript.

Class Reference: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIWebView_Class/Reference/Reference.html