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I'm trying to assign an array count to a UInt32. I get the error "Cannot convert value of type 'Int?' to specified type 'UInt32'". The array count is type Int, but the error says "Int?", which looks like an optional Int. I have no idea what else it could mean. 

let randColorCount:UInt32 = slider?.randUIColors.count

I've also tried:

let randColorCount:UInt32 = UInt32(slider?.randUIColors.count)

But I get the error "Cannot invoke initializer for type 'UInt32' with an argument list of type '(Int?)'".

Chewie The Chorkie
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1 Answers1

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slider?.randUIColors.count results in Int? because of the use of the optional chaining.

One simple solution is to combine this with the nil coalescing operator ?? to provide a default value incase slider is nil.

let randColorCount = UInt32(slider?.randUIColors.count ?? 0)
rmaddy
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