Logging a Swift enum using NSLog
nslog, swift
Solution
Get the enum's underlying `Int` value:`CKAccountStatus.Available.rawValue`.
Enums are not strictly integers in Swift, but if they're declared with an underlying type you can get it with `rawValue` — whatever that underlying type is. (`enum Foo: String` will give you strings for the `rawValue`, etc.) If an enum doesn't have an underlying type, `rawValue` has nothing to give you. In APIs imported from ObjC, any enum defined with `NS_ENUM` has an underlying integer type (typically `Int`).
If you'd like to print any enum more descriptively, you might consider making an extension on the enum type that adopts the `Printable` protocol.
Problem
I’m trying to log an enum: ``` enum CKAccountStatus : Int { case CouldNotDetermine case Available case Restricted case NoAccount } NSLog("%i", CKAccountStatus.Available) ``` The compiler complains: ``` Type 'CKAccountStatus' does not conform to protocol 'CVarArg' ``` Why? I have tried to cast the value: ``` NSLog("%i", CKAccountStatus.Available as Int) ``` But that doesn’t fly either: ``` Cannot convert the expression's type '()' to type 'String' ```