> On Sep 29, 2016, at 10:54 , Quincey Morris
> <[email protected]> wrote:
>
> On Sep 29, 2016, at 04:18 , Rick Mann <[email protected]> wrote:
>>
>> var vals = URLResourceValues()
>> vals.isExcludedFromBackup = true
>> try destURL.setResourceValues(vals)
>>
>> But I get "Cannot convert value of type 'URLResourceValues' to expected
>> argument type '[URLResourceKey : AnyObject]'" on the "vals" argument. The
>> problem is that the docs say it's supposed to take [URLResourceKey : Any].
>>
>> The Swift interface file generated by Xcode looks like this:
>>
>> public mutating func setResourceValues(_ values: URLResourceValues) throws
>>
>> But that's clearly not what the compiler sees.
>
> What is the type of ‘destURL’? URL or NSURL? It sounds like it’s NSURL.
Nope, it's URL.
> The function signature in class NSURL is:
>
>> func setResourceValues([URLResourceKey : Any])
>
> whereas the function signature in class URL is:
>
>> func setResourceValues(_ values: URLResourceValues)
>
> So, you either need to change destURL to be a URL, or use the NSURL API that
> takes a dictionary. Note that URL is not just a cosmetic renaming of NSURL in
> Swift 3, but a whole new type that wraps a NSURL object. Both types are
> accessible, though you’re going to have the best Swift 3 experience if you
> switch to URL — and its altered API and semantics.
>
> Regarding Any vs. AnyObject as the dictionary value, the error message I get
> (in Xcode 8.1 beta, with the above code) is:
>
>> Cannot convert value of type 'URLResourceValues' to expected argument
>> type '[URLResourceKey : Any]’
>
> So, you’re either not compiling against the 10.12 SDK (which I think should
> be impossible), or you’re compiling as Swift 2.3, or Xcode at least thinks
> you are.
So, it turns out, destURL was a let, not a var. That made the difference. Sure
seems like a bad diagnostic.
However, there's also a problem in that the documentation in Xcode 8 is:
func setResourceValues(_ keyedValues: [URLResourceKey : Any]) throws
But the Xcode generated interface shows it as:
public mutating func setResourceValues(_ values: URLResourceValues)
throws
And incidentally, it seems Xcode's code completion still isn't reliable, in
that I can command-click on URL, but not on setResourceValues (I just get a ?
appearing).
I'll write a bug.
--
Rick Mann
[email protected]
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