Using iOS, how would I go about creating a red \"delete\" button similar to the one used when deleting contacts on the iPhone?
I think those ones are better (and they look fine on retina display too) :
.png generated from this very nice .psd file : http://www.teehanlax.com/blog/2010/08/12/iphone-4-gui-psd-retina-display/
And then use it as a strechable image for the background of your UIButton
:
UIImage* greenButton = [UIImage imageNamed:@"UIButton_green.png"];
UIImage *newImage = [greenButton stretchableImageWithLeftCapWidth:greenButton.size.width/2 topCapHeight:greenButton.size.height/2];
[callButton setBackgroundImage:newImage forState:UIControlStateNormal];