swifttypesswift5promisekit

PromiseKit: resolve method requires String and Void be equivalent

I'm trying to use PromiseKit v6 in iOS Swift 5 app but I trip on a very basic issue. The code below throws a compiler error:

let p1 = Promise<String> { seal in
   seal.resolve("Foo"); /// Referencing instance method 'resolve' on 'Resolver' 
                        /// requires the types 'String' and 'Void' be equivalent
}

I suspect this is something utterly stupid but what's wrong here?

Solution

  • You should check https://mxcl.dev/PromiseKit/news/2018/02/PromiseKit-6.0-Released/ where the changes are described:

    Promise.init We altered the main initializer:

    Promise { fulfill, reject in

    //… } You now have:

    Promise { seal in // seal.fulfill(foo) // seal.reject(error) // seal.resolve(foo, error) }

    so seal.fulfill("Foo") will work in your case