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how to pass a quick table like UnsafePointer & lt; T & gt; argument in a...
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how to pass a quick table like UnsafePointer & lt; T & gt; argument in a function
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I read that in order to pass a swift variable/constant to an argument that expects UnsafePointer can be done by using the 'inout' (ampersand) symbol prefixing the variable/constant. So in the following code, I want to pass the 'colors' array as "UnsafePointer' to the function CGGradientCreateWithColorComponents(), but I get a compiler error:
"& used with non-inout argument of type UnsafePointer"
See image below for visual.
So, the question is , how can I convert the swift array 'colors' into an UnsafePointer ?
thanks
Change your colors type to be explicitly [CGFloat]:
var colors : [CGFloat] = [0.0, 0.0, 1.0, 1.0, 0.0, 1.0, 0.0, 1.0]
No need to deal with & or anything. But you have to actually pass in an array of CGFloat.
And don't pass in NULL but nil:
let gradient = CGGradientCreateWithColorComponents(baseSpace, colors, nil, 2)
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