- (void)viewDidLoad {
    [super viewDidLoad];

    UIColor *cBlue = [UIColor blueColor];
    UIColor *cOrange = [UIColor orangeColor];
    UIColor *cRed = [UIColor redColor];

    [self listColorComponents:cBlue   forMyName:@"Blue"];
    [self listColorComponents:cOrange forMyName:@"Orange"];
    [self listColorComponents:cRed    forMyName:@"Red"];

}

- (void) listColorComponents:(UIColor *)theColor forMyName:(NSString *)theName {

    const CGFloat *cColors = CGColorGetComponents(theColor.CGColor);

    CGFloat r = cColors[0];
    CGFloat g = cColors[1];
    CGFloat b = cColors[2];
    CGFloat a = cColors[3];

    NSLog(@"%@ Red   is %f / %d", theName, r, (int)(r * 255));
    NSLog(@"%@ Blue  is %f / %d", theName, g, (int)(g * 255));
    NSLog(@"%@ Green is %f / %d", theName, b, (int)(b * 255));
    NSLog(@"%@ Alpha is %f / %d", theName, a, (int)(a * 255));

}