将 Alamofire.Request 扩展从 Swift 2 迁移到 Swift 3

Question

我正在尝试将扩展迁移到 Alamofire.Request，但收到错误 Cannot call value of non-function type 'HTTPURLResponse?'。

我知道编译器认为我指的是成员响应而不是函数。

我已经用 DataRequest.jsonResponseSerializer 替换了 Request.JSONResponseSerializer。

谁能看到我遗漏了什么？

extension Alamofire.Request {
    public func responseSwiftyJSON(_ queue: DispatchQueue? = nil, options: JSONSerialization.ReadingOptions = .allowFragments, completionHandler:  @escaping (NSURLRequest, HTTPURLResponse?, SwiftyJSON.JSON, Error?) -> Void) -> Self {
        return response(responseSerializer: Alamofire.DataRequest.jsonResponseSerializer(options: options)) { response in
            dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
                var responseJSON: JSON

                if response.result.isFailure {
                    responseJSON = JSON.null
                } else {
                    responseJSON = SwiftyJSON.JSON(response.result.value!)
                }

                dispatch_async(queue ?? dispatch_get_main_queue(), {
                    completionHandler(self.request!, self.response, responseJSON, response.result.error)
                })
            }
        }
    }
}

Answer 1

我不确定这是否与旧版本兼容，但我建议您将扩展重写为：

extension DataRequest {
    public func responseSwiftyJSON(queue: DispatchQueue? = nil, options: JSONSerialization.ReadingOptions = .allowFragments, completionHandler:  @escaping (URLRequest?, HTTPURLResponse?, SwiftyJSON.JSON, Error?) -> Void) -> Self {
        return responseJSON(queue: queue, options: options) {
            let responseJSON: JSON
            switch result {
            case let .success(json): responseJSON = JSON(json)
            case .failure: responseJSON = JSON.null
            }

            completionHandler(request, response, responseJSON, error)
        }
    }
}

将 Alamofire.Request 扩展从 Swift 2 迁移到 Swift 3

Migrating Alamofire.Request extension from Swift 2 to Swift 3

swift3

swift2

alamofire