What should image sizes be at @1x, @2x and @3x in Xcode?

Question

For example, I have a 100*100 size imageview or button, and I want to set its image or backgroundImage with a local .png file. Based o

Answer 1

For @3x image increase @1x image size by 3 times!

e.g.

15 x 15 = @1x

30 x 30 = @2x

45 x 45 = @3x

OR

100 x 100 = @1x

200 x 200 = @2x

300 x 300 = @3x

OR

15 x 10 = @1x

30 x 20 = @2x

45 x 30 = @3x

I hope this is helpful to you!