How to get value (float) for RG & B of UIColor object?

Question

I created a UIColor object and want to set the colors before painting using CGContextSetRGBStrokeColor. To do this, I need to extract the values ​​from red, green and blue from the UIColor object. How should I do it?

Or maybe the best way to determine the color using some other methods (could not find when I was looking for it) in which I can use the UIColor object to set the color?

Thanks in advance!

/ Niklas

Answer 1

RGB . CGContextSetStrokeColorWithColor CGContextSetRGBStrokeColor.

CGContextSetStrokeColorWithColor(context, thatUIColor.CGColor);

( RGB, . RGB UIColor?.)

Answer 2

, RGB . : http://sketchup.google.com/support/bin/answer.py?hl=en&answer=96105

" ", RGB .

:

[UIColor redColor]

.