If, like me, you want to make sure your text will fit inside your UIWebView (without scrolling), you can implement the following javascript:
<script language='javascript' type="text/javascript">
function adjustHeight(maxHeight) {
elem = document.getElementById("sign");
height = elem.offsetHeight;
current_size = elem.style.fontSize.replace('px','')/1;
while ((current_size-- > 10) && (height > maxHeight)){
elem.style.fontSize = current_size + 'px';
height = elem.offsetHeight;
}
}
</script>