无法调用非函数类型的值 '((UInt) -> Data?)!'与 Alamofire 4

Question

我正在尝试为 Swift 3 和 Alamofire 4 转换代码，但我目前遇到以下错误：

Cannot call value of non-function type '((UInt) -> Data?)!'

在这一行：

multipartFormData.append(data: value!.data(using: String.Encoding.utf8.rawValue)!, name: key)

请您对本案提出意见。我当前的代码如下。

Alamofire.upload(
    multipartFormData: { multipartFormData in
        multipartFormData.append(imageData!, withName: "image", fileName: nowString + "To" + receiverString! + ".jpg", mimeType: "image/jpg")
        for (key, value) in parameters {
            multipartFormData.append(data: value!.data(using: String.Encoding.utf8.rawValue)!, name: key)
        }
    },to:"uploadimgURL"
      encodingCompletion: { encodingResult in
        switch encodingResult {
        case .success(let upload, _, _)                    
            upload.responseString(completionHandler: { (response) in
                debugPrint(response)
            })

        case .failure(let encodingError):
            print(encodingError)
        }
    }
)

Answer 1

我确实看到有问题的行有一个问题。尽量不要像这样使用枚举的原始值：

let stringValue = value as! String
multipartFormData.append(data: stringValue.data(using: .utf8)!, name: key)

无法调用非函数类型的值 '((UInt) -> Data?)!'与 Alamofire 4

Cannot call value of non-function type '((UInt) -> Data?)!' with Alamofire 4

swift

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