Problem with NSColors in cocoa

Question

i am trying to compose colors using NSColor and when i am trying to create RGB color with the following values it just displays the white colors instead:

(r,         


        

Answer 1

As stated in the documentation:

Values below 0.0 are interpreted as 0.0, and values above 1.0 are interpreted as 1.0

This means that your values (100,100,100) are going to be converted in (1.0,1.0,1.0) which is white. What you have to do is convert each channel value using the following equation:

100 : 255 = x : 1.0 => x = 100/255

where x is the value that you will use for the method

-(NSColor*)colorWithDeviceRed:CGFloat red green:CGFloat green blue:CGFloat blue alpha:CGFloat alpha];

You should have something like this in your code

[NSColor colorWithDeviceRed:100.0/255.0 green:100.0/255.0 blue:100.0/255.0 alpha:1.0];