I am using 2 variations of the same color, a light and dark version, to create a gradient.
Code:
CAGradientLayer *gradient = [CAGradientLayer layer];
UIColor *light = [baseColor lightVersion];
UIColor *dark = [baseColor darkVersion];
gradient.colors = [NSArray arrayWithObjects:(id)[light CGColor], (id)[dark CGColor], nil];
The problem is, I noticed that the CGColor
version of the original UIColor
version is different. Why is that? What is the difference between the UIColor
and CGColor
and why are they different?
UIColor
is Inherits from NSObject
and associated with UIKit Framework
while CGColor
is associated with CoreGraphics
and CGColor
is derived from CFType
.
So if you are using UIKit elements then you can use UIColor
, But if you are using drawing using Core Graphics or working with CALayer
you must use CGColor
.
As per Documentation of UIColor
Many methods in UIKit require you to specify color data using a UIColor object, and for general color needs it should be your main way of specifying colors. The color spaces used by this object are optimized for use on iOS-based devices and are therefore appropriate for most drawing needs. If you prefer to use Core Graphics colors and color spaces instead, however, you may do so.