public override void OpenWebView(string url, Rect viewRect, Action <bool> completeCallback)
{
this.openWebViewCallback = completeCallback;
string url2 = Util.AppendTimestampForUri(url);
PlatformUtilIOS.openWebView(url2, (int)viewRect.xMin, (int)viewRect.yMin, (int)viewRect.width, (int)viewRect.height);
}