Is the opacity and alpha the same thing for UIView
alpha, ios, objective-c, opacity, xcode
Solution
Actually "opacity" means "value of alpha-channel" of your `UIView`. When a view is fully opaque this means its `alpha = 1`, when a view is fully transparent (non-opaque) its `alpha = 0`.
As about properties of `CALayer` and `UIView` in Cocoa, yes, they provide the same functionality.
Problem
I want to use animation to change UIView's color to make it fade, however, somehow i can't access and set opacity, but i can set alpha. I wonder if alpha and opacity are the same? Search on the web and I didnt find a good answer. Thanks a lot for your help!