How to get RGB values from UIColor ?

I am giving an example here where you take color either as the standard color given with Apple API or you can have color created and allocated with RGBA values.

      UIColor *color = [[UIColor greenColor] retain]; //line 1

    //OR(You will have color variable either like line 1 or line 2)

    

    color = [[UIColor alloc] initWithRed:0.5 green:0.2 blue:0 alpha:1];//line 2

    CGColorRef colorRef = [color CGColor];

    

    int _countComponents = CGColorGetNumberOfComponents(colorRef);

    

    if (_countComponents == 4) {

        const CGFloat *_components = CGColorGetComponents(colorRef);

        CGFloat red     = _components[0];

        CGFloat green = _components[1];

        CGFloat blue   = _components[2];

        CGFloat alpha = _components[3];

        

        NSLog(@"%f,%f,%f,%f",red,green,blue,alpha);

    }

    

    [color release];

You have to make sure that before you extract the components out of UIColor, it should have retain count of 1. If not , then it will give error !