尝试通过 Alamofire 4.0 上传图像时，类型“ParameterEncoding”没有成员“URL”

Posted 2023-03-15

【中文标题】尝试通过 Alamofire 4.0 上传图像时，类型“ParameterEncoding”没有成员“URL”

【英文标题】：Type "ParameterEncoding" has no member 'URL' when trying to upload image through Alamofire 4.0

【发布时间】：2016-11-09 08:59:08

【问题描述】：

在将 Alamofire 更新到 4.0 版以将图像上传到服务器之前，我使用相同的代码，它工作得非常好，但现在我遇到了这些错误，我正在尝试很多，但每次都会出现新错误：

第一个错误：

第二个错误：

我的代码：

func uploadFile()  

      let image = UIImage(named: "ios9.jpg")
      let newimage : NSData = UIImageJPEGRepresentation(selectedImage.image!, 32)! as NSData

     let newRandomName = randomStringWithLength(32)
     let fname = (newRandomName as String) + ".jpg"

     let parameters = [
     "pic"           :NetData(data: newimage as Data, mimeType: .ImageJpeg, filename: fname),
     "msg"     :self.detailmsg,
     "customer_key" : self.CUSTOMER_KEY
     ] as [String : Any]



     let urlRequest = self.urlRequestWithComponents("link", parameters: parameters as NSDictionary)


     //First error here
     Alamofire.upload(urlRequest.0, data: urlRequest.1)
     .progress  (bytesWritten, totalBytesWritten, totalBytesExpectedToWrite) in
     print("\(totalBytesWritten) / \(totalBytesExpectedToWrite)")
     
     .responseJSON  response in
     debugPrint(response)
     




func urlRequestWithComponents(_ urlString:String, parameters:NSDictionary) -> (URLRequestConvertible, NSData) 

    // create url request to send
    let mutableURLRequest = NSMutableURLRequest(url: URL(string: urlString)!)
    mutableURLRequest.httpMethod = Alamofire.HTTPMethod.post.rawValue
    //let boundaryConstant = "myRandomBoundary12345"
    let boundaryConstant = "NET-POST-boundary-\(arc4random())-\(arc4random())"
    let contentType = "multipart/form-data;boundary="+boundaryConstant
    mutableURLRequest.setValue(contentType, forHTTPHeaderField: "Content-Type")


    // create upload data to send
    let uploadData = NSMutableData()

    // add parameters
    for (key, value) in parameters 

        uploadData.append("\r\n--\(boundaryConstant)\r\n".data(using: String.Encoding.utf8)!)

        if value is NetData 
            // add image
            let postData = value as! NetData


            //uploadData.appendData("Content-Disposition: form-data; name=\"\(key)\"; filename=\"\(postData.filename)\"\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)

            // append content disposition
            let filenameClause = " filename=\"\(postData.filename)\""
            let contentDispositionString = "Content-Disposition: form-data; name=\"\(key)\";\(filenameClause)\r\n"
            let contentDispositionData = contentDispositionString.data(using: String.Encoding.utf8)
            uploadData.append(contentDispositionData!)


            // append content type
            //uploadData.appendData("Content-Type: image/png\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!) // mark this.
            let contentTypeString = "Content-Type: \(postData.mimeType.getString())\r\n\r\n"
            let contentTypeData = contentTypeString.data(using: String.Encoding.utf8)
            uploadData.append(contentTypeData!)
            uploadData.append(postData.data as Data)

        else
            uploadData.append("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n\(value)".data(using: String.Encoding.utf8)!)
        
    
    uploadData.append("\r\n--\(boundaryConstant)--\r\n".data(using: String.Encoding.utf8)!)



    // return URLRequestConvertible and NSData
   // return (Alamofire.ParameterEncoding.encode(mutableURLRequest as! ParameterEncoding).0, uploadData)

    //Second error here
    return (Alamofire.ParameterEncoding.URL.encode(mutableURLRequest, parameters: nil).0, uploadData)

【问题讨论】：

你可以通过multipartFormData来完成这项工作

@HamzaAnsari 我该怎么做你能举个例子吗？

@samah 你是怎么解决的？有同样的问题 - 类型 ParameterEncoding 没有成员 'url'

@ThripthiHaridas 我可以通过将“URL”更改为小写“url”来消除错误

【参考方案1】：

let image = UIImage(named: "ios9.jpg")
let params:[String:Any] = ["msg": self.detailmsg,
                           "customer_key": self.CUSTOMER_KEY]

let urlRequest = try! URLRequest(url: url, method: .post, headers: nil)

Alamofire.upload(multipartFormData:  (multipartFormData) in

    if let imageData = UIImageJPEGRepresentation(image!, 1.0)
         multipartFormData.append(imageData, withName: "pic", fileName:"image.jpg", mimeType: "image/jpg")
    
    for (key, value) in self.parameters! 
        let data = "\(value)".data(using: .utf8)
        multipartFormData.append(data!, withName: key)
    

, with: urlRequest)  (result) in
       switch result
       case .success(let request, _, _):
           request.responseJSON  response in
              debugPrint(response)
           
       case .failure(let error):
             print(error.localizedDescription)