Comments on: UIColor Macros

By: Jacek Marchwicki

Jacek Marchwicki — Tue, 25 Oct 2011 14:19:23 +0000

or:
#define RGB(r, g, b) [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:1]
#define RGBA(r, g, b, a) [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:a]
#define HTML(rgb) RGB((double)(rgb >> 16 & 0xff), (double)(rgb >> 8 & 0xff), (double)(rgb & 0xff))

then:
[label setTextColor:HTML(0xff0000)];

By: Joe Masilotti

Joe Masilotti — Sat, 10 Sep 2011 19:22:34 +0000

Thanks so much for this, it’s proven to be a huge time saver.

Genius!

By: Ron Sweeney

Ron Sweeney — Wed, 01 Dec 2010 14:15:41 +0000

very nice and clean…

I use this one I stumbled upon months ago…

https://gist.github.com/631616

By: Geoff

Geoff — Mon, 12 Jul 2010 03:21:47 +0000

I finally got it, thanks though. I had originally placed inside @interface and @end and then had deleted everything in the .h minus the #define. I added a new file with #define inside @protocol and @end and included that .h wherever needed.

The next problem I ran into was that the color change was not visible at runtime. I had to move my code to set the cell background color from cellForRowAtIndexPath to willDisplayCell, then it showed up as expected.

Thanks again, and nice macro.

By: John Muchow

John Muchow — Mon, 12 Jul 2010 03:05:35 +0000

Geoff,

You should be able to copy the definitions into a .h file that you include wherever needed. Something else may be amiss, as I just copy/pasted the defines into a source file with no errors. If you remove the definitions does your app compile as expected?

By: Geoff

Geoff — Mon, 12 Jul 2010 00:23:00 +0000

Thanks that fixed the compiler problem. However next it tells me that I’m implicitly defining that function when I go to use it. I assumed that placing it in a random .h file anywhere would make it globally available. When that turned out incorrect I tried including the .h file but that didn’t work either. I guess I just need to research how to use #define statements in terms of where to place them and how to reuse across multiple files.

By: John Muchow

John Muchow — Mon, 05 Jul 2010 22:31:12 +0000

Geoff,

Did you try the macro definitions all on one line (I split the lines so they would fit on the post without scrolling)?

By: Geoff

Geoff — Sun, 04 Jul 2010 19:18:55 +0000

Where do you paste the macro in at? I tried after my import statements in my app delegate and I get compiler errors:

error: expected identifier or ‘(‘ before ‘[‘ token

By: gonzobrains

gonzobrains — Wed, 07 Apr 2010 04:25:48 +0000

just what the iPhone doctor ordered! thanx for this one, dude!

By: Lawrence

Lawrence — Wed, 17 Feb 2010 20:22:04 +0000

Thanks or this. It was just what I needed!