If you want to position an @2x view (1 pt = 2 px) you need to use fractional points. A view at (0, 0.5) in points is (0, 1) in pixels. Resolution Independence w

If you want to position an @2x view (1 pt = 2 px) you need to use fractional points. A view at (0, 0.5) in points is (0, 1) in pixels. Resolution Independence was a separate concept.