Lim Thye Chean Lim Thye Chean - 5 days ago 5
Swift Question

Converting Swift array to CFArray in Xcode 8 (Swift 3)

This no longer works in Xcode 8 beta 6:

let colors:CFArray = [fromColor.cgColor, toColor.cgColor]


or

let gradient:CGGradient = CGGradient(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors:[fromColor.cgColor, toColor.cgColor], locations:[0.0, 1.0])!


The error is: Contextual type 'CFArray' cannot be used with array literal

What's the latest way to convert from array to CFArray?

Answer

It works if you add the cast as CFArray:

let colors = [fromColor.cgColor, toColor.cgColor] as CFArray

or you can add the cast in a call:

let gradient = CGGradient(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors:[fromColor.cgColor, toColor.cgColor] as CFArray, locations:[0.0, 1.0])!

In Swift 3 (Xcode 8 beta 6), implicit casting to bridged types has been removed. In some cases, like this one, you will need to add explicit casting to make it work.

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