How do I create a 1px line in Interface Builder?

Question

Note, I\'m looking to make a 1px line, not a 1pt line. Meaning it should be 1px regardless of screen scale (so 0.5pt on Retina devices).

I can do this programmatica

Answer 1

Just in case someone else comes here wanting to know how it can be done programmatically, heres how you do it:

Interface Builder

Make a height constraint in IB to the desired view and set the constant to 1.

Then you will need to CTRL+Drag from the constraint into your custom view or ViewController.

Whenever the Xib is loaded, be it in awakeFromNib or viewDidLoad, you are going to set the constant of the constraint to the scale of the display:

Swift

onePixelViewHeightConstraint.constant = 1/UIScreen.main.scale//enforces it to be a true 1 pixel line

Objective-C

self.onePixelViewHeightConstraint.constant = 1.f/[UIScreen mainScreen].scale;//enforces it to be a true 1 pixel line

Enjoy