使用Swift 4将Pdf、Docx和图像文件上载到服务器

一个根本的错误是,您正在使用 dataTask 而不是 uploadTask 在您的 URLSession 实例,例如。 uploadTask(with:from:completionHandler:)

车身数据的构造

下面是我自己的代码中的一个通用示例(如下面的注释所要求的),说明了如何构造正文数据:

// imagesURLS is an optional array of URLs, i.e. imageURLS:[URL]?

if let imgURLs = imagesURLS {
    for f in imgURLs {
        let filename = f.lastPathComponent  
        let splitName = filename.split(separator: ".")
        let name = String(describing: splitName.first)
        let filetype = String(describing: splitName.last)

        let imgBoundary = "\r\n--\(boundary)\r\nContent-Type: image/\(filetype)\r\nContent-Disposition: form-data; filename=\(filename); name=\(name)\r\n\r\n"

        if let d = imgBoundary.data(using: .utf8) {
            bodyData.append(d)
        }

        do {
            let imgData = try Data(contentsOf:f, options:[])
            bodyData.append(imgData)
        }
        catch {
            // can't load image data
        }

        }
    }
    let closingBoundary = "\r\n--\(boundary)--"
    if let d = closingBoundary.data(using: .utf8) {
            bodyData.append(d)
    }

循环意味着每个数据项(在本例中为图像)前面都有一个边界字符串,在最后一个数据项之后添加闭合边界字符串(即以双连字符结尾的字符串)。

这对我来说很有用,在Swift4中:

func uploadFiles(_ urlPath: [URL]){

if let url = URL(string: "YourURL"){
var request = URLRequest(url: url)
let boundary:String = "Boundary-\(UUID().uuidString)"

request.httpMethod = "POST"
request.timeoutInterval = 10
request.allHTTPHeaderFields = ["Content-Type": "multipart/form-data; boundary=----\(boundary)"]

    for path in urlPath{
        do{
            var data2: Data = Data()
            var data: Data = Data()
            data2 = try NSData.init(contentsOf: URL.init(fileURLWithPath: path.absoluteString, isDirectory: true)) as Data
            /* Use this if you have to send a JSON too.
             let dic:[String:Any] = [
             "Key":Value,
             "Key":Value
            ]


            for (key,value) in dic{
                data.append("------\(boundary)\r\n")
                data.append("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
                data.append("\(value)\r\n")
            }
              */
            data.append("------\(boundary)\r\n")
            //Here you have to change the Content-Type
            data.append("Content-Disposition: form-data; name=\"file\"; filename=\"YourFileName\"\r\n")
            data.append("Content-Type: application/YourType\r\n\r\n")
            data.append(data2)
            data.append("\r\n")
            data.append("------\(boundary)--")

            request.httpBody = data
        }catch let e{
            //Your errors
        }
        DispatchQueue.global(qos: DispatchQoS.QoSClass.userInitiated).sync {
            let session = URLSession.shared
            let task = session.dataTask(with: request, completionHandler: { (dataS, aResponse, error) in
                if let erros = error{
                    //Your errors
                }else{
                    do{
                        let responseObj = try JSONSerialization.jsonObject(with: dataS!, options: JSONSerialization.ReadingOptions(rawValue:0)) as! [String:Any]

                    }catch let e{

                    }
                }
            }).resume()
        }
    }
}
}

extension Data{
mutating func append(_ string: String, using encoding: String.Encoding = .utf8) {
    if let data = string.data(using: encoding) {
        append(data)
    }
}
}

上载图像的示例代码为:

func uploadImage(){
    var imageToUpload:UIImage = UIImage()

    let nsDocumentDirectory = FileManager.SearchPathDirectory.documentDirectory
    let nsUserDomainMask    = FileManager.SearchPathDomainMask.userDomainMask
    let paths               = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMask, true)
    if let dirPath          = paths.first
    {
        let imageURL = URL(fileURLWithPath: dirPath).appendingPathComponent("Image2.png") //Your image name here
        let image    = UIImage(contentsOfFile: imageURL.path)
        imageToUpload = image!
    }



    Alamofire.upload(multipartFormData: { (multipartFormData) in
        multipartFormData.append(UIImageJPEGRepresentation(imageToUpload, 1)!, withName: "Prescription", fileName: "Profile_Image.jpeg", mimeType: "image/jpeg")
    }, to:"you_URL_here")
    { (result) in
        switch result {
        case .success(let upload, _, _):
            print(result)

            upload.uploadProgress(closure: { (progress) in
                print(progress)
            })

            upload.responseJSON { response in
                //print response.result
                print(response);
            }

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

}