Portion of Image as Button Background

raggeddesign · 01-21-2009, 04:11 PM

Hi,

I want the background image of a UIButton to only be a portion of a larger image. So if I had a large image, I want to specify ONLY the right corner 125x125 as the button image background (as an example) I will need to be able to specify the section of the image I want to use as the button background since it will change.

Does that make sense? Do you know how to do that?

QuantumDoja · 01-21-2009, 04:38 PM

Have you looked at clipping properties in interface builder?

raggeddesign · 01-21-2009, 05:10 PM

Quote:

Originally Posted by QuantumDoja

Have you looked at clipping properties in interface builder?

Clipping? Not sure where that is, I see a 'clip subviews' setting. Either way,
I would need to do this through code since the image may come from the users images.

Would you know how to specify the same request for a UIImageView? Having the imageView only show a specified portion of a larger image?

I'll do some searching on clipping and see if I can turn something up, any additional info would be very helpful!

Thanks.

raggeddesign · 01-26-2009, 03:16 PM

bump....

Still looking for solution to this issue. I've been researching CGImage but its all still very new to me, not sure where to even look.

Anyone have ANY suggestions?

lbendlin · 01-26-2009, 06:59 PM

Yes,CG is the way to go. Load the image into a CG context, transform as needed and then load the result into the button. There is even code for rounded corners...

raggeddesign · 01-27-2009, 11:48 AM

Quote:

Originally Posted by lbendlin

Yes,CG is the way to go. Load the image into a CG context, transform as needed and then load the result into the button. There is even code for rounded corners...

Thanks for pointing me in the right direction! Do you know of any good tutorials/resources to do any of the above things?

lbendlin · 01-27-2009, 11:57 AM

this one helped me get starting
iPhone development - UIImage with round corners