UIScreen.mainScreen.scale on NSScreen

Question

I have a problem with CATextLayer cleaning. and with iOS the solution is:

textLayer.contentsScale = UIScreen.mainScreen.scale

But I can't found "scale" property on cocoa NSScreen

Note: Answer with Object-C or Swift are OK.

score 14 · Accepted Answer · edited Jul 17 '15 at 17:51

14

[[NSScreen mainScreen] backingScaleFactor] will give you the scaling factor for main display

edited Jul 17 '15 at 17:51

Stefan Arentz

answered Jul 03 '15 at 08:14

sac

I don't have Macbook retina, so I can't test your answer, please help me test on retina. On Macbook no retina [[NSScreen mainScreen] backingScaleFactor] = 1. – Huynh Inc Jul 08 '15 at 08:29
1

This API returns 2 if its a retina display – sac Jul 08 '15 at 09:42
You can put any Mac into HiDPI mode for testing: http://cocoamanifest.net/articles/2013/01/turn-on-hidpi-retina-mode-on-an-ordinary-mac.html – Frank R. Jul 09 '15 at 09:06

score 6 · Answer 2 · answered Jul 03 '15 at 07:43

6

I'm not sure it's the same as on iOS but NSScreen has backingScaleFactor, which might do the trick.

answered Jul 03 '15 at 07:43

Frank R.

I don't have Macbook retina, so I can't test your answer, please help me test on retina. On Macbook no retina [[NSScreen mainScreen] backingScaleFactor] = 1. – Huynh Inc Jul 08 '15 at 08:28

score 2 · Answer 3 · answered Jan 11 '19 at 09:16

2

swift 4.2:

(NSScreen.main?.backingScaleFactor)!

answered Jan 11 '19 at 09:16

roberto

3 Answers3