OS X开发 --- 10.8之前系统 NSColor 转 CGColorRef

NS_INLINE CGColorRef CGColor(NSColor *color)

{

    const NSInteger numberOfComponents = [color numberOfComponents];

    CGFloat components[numberOfComponents];

    CGColorSpaceRef colorSpace = [[color colorSpace] CGColorSpace];

    [color getComponents:(CGFloat *)&components];

    return (CGColorRef)(id)CGColorCreate(colorSpace, components);

}