Question

我是新手，我正在尽力快速学习。现在我正在处理多部分表单数据。我有一个带有票务系统的API，它需要2个String和一个Integer和一个fileData（Picture）。服务器管理员说我必须使用多部分表单数据才能成功执行POST请求。

如果有人可以帮助我编写代码，我将不胜感激。 API地址为：http://app.avatejaratsaba1.com/api/Ticket/SendTicket，在邮递员中可以正常使用，但是当我尝试将邮递员代码进行swift时，会出现一些错误？！

更新：

let headers = [
            "content-type": "multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW",
            "Cache-Control": "no-cache",
            "Postman-Token": "ed42f6a7-a01c-432f-82f4-bed9560814e1"
        ]
        let parameters = [
            [
                "name": "Title",
                "value": "abcd3"
            ],
            [
                "name": "Description",
                "value": "a"
            ],
            [
                "name": "Unit",
                "value": "1"
            ],
            [
                "name": "FileData",
                "fileName": "/Users/Am1rFT/Desktop/Screen Shot 2018-07-06 at 1.14.03 AM.jpg"
            ]
        ]

        let boundary = "----WebKitFormBoundary7MA4YWxkTrZu0gW"

        var body = ""
        var error: NSError? = nil
        for param in parameters {
            let paramName = param["name"]!
            body += "--\(boundary)\r\n"
            body += "Content-Disposition:form-data; name=\"\(paramName)\""
            if let filename = param["fileName"] {
                let contentType = param["content-type"]!
                let fileContent = String(contentsOfFile: filename, encoding: String.Encoding.utf8)
                if (error != nil) {
                    print(error)
                }
                body += "; filename=\"\(filename)\"\r\n"
                body += "Content-Type: \(contentType)\r\n\r\n"
                body += fileContent
            } else if let paramValue = param["value"] {
                body += "\r\n\r\n\(paramValue)"
            }
        }

        let request = NSMutableURLRequest(url: NSURL(string: "http://app.avatejaratsaba1.com/api/Ticket/SendTicket")! as URL,
                                          cachePolicy: .useProtocolCachePolicy,
                                          timeoutInterval: 10.0)
        request.httpMethod = "POST"
        request.allHTTPHeaderFields = headers
        request.httpBody = postData as Data

        let session = URLSession.shared
        let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
            if (error != nil) {
                print(error)
            } else {
                let httpResponse = response as? HTTPURLResponse
                print(httpResponse)
            }
        })

        dataTask.resume()

The Errors

更新

Error

更新：

if let filename = param["fileName"] {
            let contentType = param["content-type"]
            do{
                let fileContent = try  String(contentsOfFile: filename as! String , encoding: String.Encoding.utf8)

            if (error != nil) {
                print(error as Any)
            }

在这部分代码中，我得到

“线程1：信号SIGABRT”

并在控制台中显示：

“无法将类型为'UIImage'（0x1b4c9ad50）的值转换为'NSString' （0x1b4c767b8）。”

快速使用多部分表单数据

0 个答案: