How to get the correct font sizes from Photoshop into iOS

Question

I have a design in an psd file. So I copied all text properties (fontname, size (in pt), color, etc) into code and run it. I did a screenshot and compared that to the design. I

Answer 1

Photoshop ratina images-12Pt = Ios-6Pt(X=2*Y) photoshop not ratina images-12pt = Ios-12pt(X=Y)