swift - 从 swift 2 转换代码时出现关闭错误

Question

我有以下代码，其中我使用一些参数发出激活请求

        /*
    Make an API request for activation
    */
    var parameters: [String : AnyObject] =
    [
        "code" : code as AnyObject,
        "dob" : httpClient.dateOfBirthFormatter.string(from: dateOfBirth) as AnyObject,
        "csr" : CSR as AnyObject,
        "deviceType" : systemVersion as AnyObject,
        "deviceModel" : deviceInfo as AnyObject
    ]
    if let deviceId = deviceId {
        parameters["deviceId"] = deviceId as AnyObject?
    }

    httpClient.devicePOST("api/activation", parameters: parameters as AnyObject?, handleAuthorization: false, start: nil, retry: nil,

        success:
        {
            (task: URLSessionDataTask, result: AnyObject?) -> Void in

            guard let response = result as? [String : AnyObject] else {
                failure(NSError(domain: "", code: 0, userInfo: ["reason" : "Invalid response"]))//change this later
                return
            }

            guard let certificatePEM = response["certificate"] as? String else {
                failure(NSError(domain: "", code: 0, userInfo: ["reason" : "Invalid response: certificate"]))//change this later
                return
            }

            /*
            Data is valid, activation is successful. Retrieve optional device identifier and call success handler
            */
            var deviceId: UUID?
            if let identifier = response["id"] as? String {
                deviceId = UUID(uuidString: identifier)
            }

            success(certificatePEM, customerId, patientId, deviceId)
        },

        failure: {

            (task: URLSessionDataTask?, error: NSError) -> Void in

            if let data = error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] as? Data {
                if let string = String(data: data, encoding: String.Encoding.ascii) {
                    print(string)
                }
            }

            failure(error)
        }
    )
}

设备POST函数定义如下

typealias StartSessionTaskHandler = (URLSessionDataTask) -> Void
typealias RetrySessionTaskHandler = (URLSessionDataTask) -> Void
typealias SuccessResponseHandler = ( URLSessionDataTask, AnyObject?) -> Void
typealias FailureResponseHandler = (URLSessionDataTask?, NSError) -> Void


func devicePOST(_ URLString: String, parameters: AnyObject?, handleAuthorization: Bool = true, start: StartSessionTaskHandler?, retry: RetrySessionTaskHandler?, success: SuccessResponseHandler?, failure: FailureResponseHandler?) {

    guard let deviceService = deviceService else {

        failure?(nil, NSError(domain: "", code: 0, userInfo: ["reason": "device service is unavailable"]))
        return
    }

    POST(deviceService, URLString: URLString, parameters: parameters, handleAuthorization: handleAuthorization, start: start, retry: retry, success: success, failure: failure)
}

在 POST 函数中，当我尝试检查闭包 block 时，我看到类似这样的内容

所以我猜这些 block 没有正确传递。当我使用 swift 2 时，这工作得很好。有人可以帮我解决这个问题吗？提前致谢

Answer 1

通过定义失败和成功的 block 来修复。

我将成功关闭定义为

  success : {
        (task:URLSessionDataTask,object: Any?) -> Void in
         success(task,object)
    }, failure: failure)

这通常是我将数据传回堆栈的方法