Different colors on same 1pt line in iOS

Question

My app has a bunch of 1pt lines in it, and I've been going through and making sure none of them are positioned in a place where iOS anti-aliases the line. However, in the image below, even though the line isn't anti-aliased, it looks like it's drawing the left & right border edges with a different shade of gray. What could be causing this?

Answer 1

If you just want to add borders to an UIView I think QuartzCore is the way to go. Here's an example:

view.layer.borderWidth = 1.0f;
view.layer.borderColor = [UIColor darkGrayColor].CGColor;
view.layer.cornerRadius = 2.0f;

Just remember to import QuartzCore (#import <QuartzCore/QuartzCore.h>). Also take a look at CALayer documentation, there are a lot other things you can do.

Good Luck!