This calculates the height of webview based on the html page.

gistfile1.m

NSMutableString *js = [NSMutableString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"individualnotification" ofType:@"js"] encoding:NSUTF8StringEncoding error:nil];
    [js appendString:@"getHeightForElementById(\"idNotificationContent\")"];
    
    float height = [[contentWebView stringByEvaluatingJavaScriptFromString:js] floatValue];


function getHeightForElementById(elementID) {
    var height = 0;
  var subElements = Array();
    var element = document.getElementById(elementID);
	
	subElements = element.getElementsByTagName("div");
    for (var i = 0; i < subElements.length; i++) {
		var subElement = subElements[i];
		var elementHeight = subElement.offsetHeight;	
			
		height += elementHeight;
	}
	
	
	subElements = element.getElementsByTagName("table");
    for (var i = 0; i < subElements.length; i++) {
		var subElement = subElements[i];
		var elementHeight = subElement.offsetHeight;
		
		height += elementHeight;
	}
    
	return height;
}