[英]ResponseSerializer 'cannot call value of non-function type 'NSHTTPURLResponse?'' with Swift 3
I had been using the following code without issue until updating to Xcode 8 beta 6. It is similar to this example from the Alamofire repository. 在更新到Xcode 8 beta 6之前,我一直在使用以下代码而没有问题。它与Alamofire存储库中的此示例类似。 This morning I updated my Alamofire library to the latest
swift3
branch, which is now compatible with beta 6. It shows the error: Cannot call value of non-function type 'HTTPURLResponse?'
今天早上我将我的Alamofire库更新到最新的
swift3
分支,现在与beta 6兼容。它显示错误: Cannot call value of non-function type 'HTTPURLResponse?'
A similar question exists here , but it is not based on the current version of Swift and Alamofire. 这里存在类似的问题,但它不是基于当前版本的Swift和Alamofire。
From what I understand, this error is because it thinks that I am trying to return the Request
property response
instead of the function response(responseSerializer: <T>, completionHandler: <(Response<T.SerializedObject, T.ErrorObject>) -> Void>)
and it thinks this because of a type error in either the responseSerializer
or completionHandler
that I'm passing into the function. 据我所知,这个错误是因为它认为我试图返回
Request
属性response
而不是函数response(responseSerializer: <T>, completionHandler: <(Response<T.SerializedObject, T.ErrorObject>) -> Void>)
并且它认为这是因为我传递给函数的responseSerializer
或completionHandler
中的类型错误。
How can I adjust this code to make it compatible with the function declaration and compiler? 如何调整此代码以使其与函数声明和编译器兼容?
I added @escaping
to the completionHandler to correct the error. 我将
@escaping
添加到completionHandler以更正错误。
import Foundation
import Alamofire
import SwiftyJSON
extension Alamofire.Request {
public func responseObject<T: ResponseJSONObjectSerializable>(_ completionHandler: @escaping (Response<T, NSError>) -> Void) -> Self {
let responseSerializer = ResponseSerializer<T, NSError> { request, res, data, error in
guard let responseData = data else {
let error = DFError.error(withDFCode: .dataSerializationFailed, failureReason: "Data could not be serialized because input data was nil.")
return .failure(error)
}
let jsonData: Any?
do {
jsonData = try JSONSerialization.jsonObject(with: responseData, options: [])
} catch {
let error = DFError.error(withDFCode: .jsonSerializationFailed, failureReason: "JSON could not be serialized into response object")
return .failure(error)
}
let json = SwiftyJSON.JSON(jsonData!)
if let newObject = T(json: json) {
return .success(newObject)
}
let error = DFError.error(withDFCode: .jsonSerializationFailed, failureReason: "JSON could not be serialized into response object")
return .failure(error)
}
return response(responseSerializer: responseSerializer, completionHandler: completionHandler)
//Error: Cannot call value of non-function type 'HTTPURLResponse?'
}
}
您需要将completionHandler
标记为@escaping
。
I was still seeing this error even after adding @escaping
to the closure. 即使将
@escaping
添加到闭包中,我仍然看到此错误。 The issue I had was that I needed to change my extension declaration from extension Alamofire.Request { }
to extension Alamofire.DataRequest { }
. 我遇到的问题是我需要将扩展声明从
extension Alamofire.Request { }
更改为extension Alamofire.DataRequest { }
。
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