Skip to content

Instantly share code, notes, and snippets.

@kylefox
Created January 27, 2012 17:45
Show Gist options
  • Save kylefox/1689973 to your computer and use it in GitHub Desktop.
Save kylefox/1689973 to your computer and use it in GitHub Desktop.
Generate a random color (UIColor) in Objective-C
/*
Distributed under The MIT License:
http://opensource.org/licenses/mit-license.php
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
CGFloat hue = ( arc4random() % 256 / 256.0 ); // 0.0 to 1.0
CGFloat saturation = ( arc4random() % 128 / 256.0 ) + 0.5; // 0.5 to 1.0, away from white
CGFloat brightness = ( arc4random() % 128 / 256.0 ) + 0.5; // 0.5 to 1.0, away from black
UIColor *color = [UIColor colorWithHue:hue saturation:saturation brightness:brightness alpha:1];
@ardarda
Copy link

ardarda commented Aug 4, 2015

Thx!

@karonator
Copy link

Nice, thank you!

@domagojb
Copy link

domagojb commented Sep 1, 2015

Nice thanks

@VladKorzun
Copy link

Thanks a lot

@manishios
Copy link

I have a color code like "15233421". How can I consider alpha value while using any of the solution?

@SudoKel
Copy link

SudoKel commented Feb 19, 2017

Thank you! 👍

@enigmatic7earth
Copy link

Thank you so much for this share. It helps people like me who are new to iOS programming in ObjC

@JAGATBARAIYA
Copy link

Great...!

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment