类型'X'不符合协议'ResponseObjectSerializable'

Question

我尝试使用Alamofire进行自定义响应序列化

我遵循README中的内容并创建协议和扩展

@objc public protocol ResponseObjectSerializable {
    init?(response: NSHTTPURLResponse, representation: AnyObject)
}

extension Alamofire.Request {
    public func responseObject<T: ResponseObjectSerializable>(completionHandler: (NSURLRequest, NSHTTPURLResponse?, T?, NSError?) -> Void) -> Self {
        let serializer: Serializer = { (request, response, data) in
            let JSONSerializer = Request.JSONResponseSerializer(options: .AllowFragments)
            let (JSON: AnyObject?, serializationError) = JSONSerializer(request, response, data)
            if response != nil && JSON != nil {
                return (T(response: response!, representation: JSON!), nil)
            } else {
                return (nil, serializationError)
            }
        }

        return response(serializer: serializer, completionHandler: { (request, response, object, error) in
            completionHandler(request, response, object as? T, error)
        })
    }
}

但是当我尝试遵守它时我得到了这个错误类型'my_model_class'不符合协议'ResponseObjectSerializable'

我的模型只是一个裸骨类

final class Shot: ResponseObjectSerializable {
    required init?(response: NSHTTPURLResponse, representation: AnyObject) {
    }
}

与Xcode 6.3一起使用，有谁经历过这个？ 并知道如何使这项工作？

对@airspeed的回应错误消失了，但令我困惑的是Apple Swift文档中有一个关于@objc协议的例子和符合它的swift类不需要@objc

@objc protocol CounterDataSource {
    optional func incrementForCount(count: Int) -> Int
    optional var fixedIncrement: Int { get }
}

class TowardsZeroSource: CounterDataSource {
    func incrementForCount(count: Int) -> Int {
        if count == 0 {
            return 0
        } else if count < 0 {
            return 1
        } else {
            return -1
        }
    }
}

Answer 1

与协议不同， Shot未标记为@objc ，因此您的init与要求不匹配：

@objc public protocol ResponseObjectSerializable {
    init?(response: NSHTTPURLResponse, representation: AnyObject)
}

final class Shot: ResponseObjectSerializable {
    @objc required init?(response: NSHTTPURLResponse, representation: AnyObject) {
    }
}

导致错误：

注意：协议需要初始化程序init(response:representation:)与类型(response: NSHTTPURLResponse, representation: AnyObject)

  init?(response: NSHTTPURLResponse, representation: AnyObject)` ^ 

注意：候选人不是@objc ，但协议需要它

将@objc在Shot的定义之前，它应该编译。