Core Graphics Vs Images for a custom button

Question

When should I go with core graphics over images for making a custom UIButton? Is core graphics faster? Other than resolution independence, are there any other major benefits?

Answer 1

Additional thoughts to ughoavgfhw's comment:

1. Images can be cached (like when you use [UIImage imageNamed:]). So you even won't use more memory for new buttons, except the first one displayed. (And no allocations, except memory for a new pointer).

2. You can use stretchable images for button creation, and avoid some (not all and not always) problems with resolution dependence:

   UIImage *myImg = [UIImage imageNamed:@"myImg.png"];
   UIImage *myImgStretchable = [myImg stretchableImageWithLeftCapWidth:10 topCapHeight:10];
   [myButton setBackgroundImage:myImgStretchable forState:UIControlStateNormal];