>
> Ah ok, figured it out; your code gave me a hint. If you have a String, the
> methods that are in NSString just work on it. If you want the extensions, you
> have to be explicit about NSString:
>
> drawable.name is a String?:
>
>
> // does not work, sizeWithFont not found
> if let name = drawable.name {
> var size = name.sizeWithFont(font)
> // etc...
> }
>
> // works fine
> if let name: NSString = drawable.name {
> var size = name.sizeWithFont(font)
> // etc...
> }
>
> (Yes, sizeWithFont is deprecated, I still need to switch it out with
> sizeWithAttributes)
>
> Thanks!!
>
I finally came across this in the 'Swift Interoperability in Depth" WWDC video
where it says ..
Foundation NSString APIs are available on String
let fruits =
"apple;banana;cherry".componentsSeparatedByString(";")
// inferred
as String[]
Cast to NSString to access properties and methods on NSString
categories
("Welcome to WWDC 2014" as NSString).myNSStringMethod()
it also suggests that if you find yourself doing that often for a given method,
you write the extension in Swift.
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