符合Swift中的协议

Question

I am new to Swift development and am struggling while trying to do some tutorials (I know, they are step by step, but apparently I must have messed up somewhere along the line and now I can't figure out for the life of my why it isn't working. I am not very good at debugging and lack a solid understanding of the foundation of the language. If anyone could help point me in the right direction I would appreciate it.

I've tried commenting things out to try and get it as "bare bones" as possible while still being able to "conform" but I am pretty stuck at the moment.

Here is the code:

Error received on this class:

final class ForecastAPIClient : APIClient {

    let configuration: NSURLSessionConfiguration
    lazy var session : NSURLSession = {
        return NSURLSession(configuration: self.configuration)
    }()

    private let token : String


    init(config: NSURLSessionConfiguration, APIKey: String){
        self.configuration = config
        self.token = APIKey
    }

    convenience init(APIKey: String){
        self.init(config: NSURLSessionConfiguration.defaultSessionConfiguration(), APIKey: APIKey)
    }

    func fetchCurrentWeather(coordinate: Coordinate, completion : APIResult<CurrentWeather> -> Void){
        let request = Forecast.Current(token: self.token, coordinate: coordinate).request
    }

}

trying to conform to this protocol:

protocol APIClient{

    var configuration : NSURLSessionConfiguration { get }
    var session : NSURLSession { get }

    init(withConfig: NSURLSessionConfiguration)

    func JSONTaskWithRequest(request: NSURLRequest, completion: JSONTaskCompletion) -> JSONTask

    func fetch<T>(request: NSURLRequest, parse: JSON -> T?, completion: APIResult<T> -> Void)

}

Sorry if this is already answered.. I searched and read through some other posts, but I still wasn't able to figure it out.

Thanks in advance!

Answer 1

It looks like your class isn't implementing two of the methods from the protocol:

func JSONTaskWithRequest(request: NSURLRequest, completion: JSONTaskCompletion) -> JSONTask

and

func fetch<T>(request: NSURLRequest, parse: JSON -> T?, completion: APIResult<T> -> Void)

Also, your class has an initializer with this signature:

init(config: NSURLSessionConfiguration, APIKey: String)

When the protocol requires:

init(withConfig: NSURLSessionConfiguration)