How to enlarge dynamically an UILabel (label and font size)?

Question

Im currently working on an iPhone project. I want to enlarge dynamically an UILabel in Objective-C like this:

alt text http://img268.imageshack.us/img268/9683/bildschirmfoto20100323u.png

How is this possible? I thought I have to do it with CoreAnimation, but I didn't worked. Here is the code I tried:

UILabel * fooL = //[…]
fooL.frame = CGRectMake(fooL.frame.origin.x, fooL.frame.origin.y, fooL.frame.size.width, fooL.frame.size.height);   
fooL.font = [UIFont fontWithName:@"Helvetica" size:80];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDelegate:self];
[UIView setAnimationDuration:0.5];
[UIView setAnimationBeginsFromCurrentState:YES];
fooL.font = [UIFont fontWithName:@"Helvetica" size:144]; //bigger size
fooL.frame = CGRectMake(20 , 44, 728, 167); //bigger frame
[UIView commitAnimations];

The problem with this code is that it doesn't change the fontsize dynamically.

Answer 1

All you need to do is apply an affine transform to the UILabel object.

CGFloat scaleFactor = 2.0f;
label.transform = CGAffineTransformMakeScale(scaleFactor, scaleFactor); // Enlarge by a factor of 2.

Answer 2

Scaling your label as suggested by others using the transform property will work great. One thing to keep in mind is that as the label gets larger, the font is not increasing, but just the rendered text, which means it will appear "fuzzier" as it gets larger.