如何使用文本参数和图像文件发送post数据？

我创建了一个应用程序，允许用户上传图像和几个到我们的服务器。 如果我只发布文本数据，我的代码会成功将数据发布到服务器，但是当我尝试使用图像数据发布文本数据时，我的服务器会抛出exception。

这是我的代码：

class func Enroll(image: UIImage, date: String, studentid: String, guardianid:String, type:String){ //date,student_id,type,guardian_id,image, type var textBody : String? let imageData = UIImagePNGRepresentation(image) let boundary = NSString(format: "---------------------------14737809831466499882746641449") let contentType = NSString(format: "multipart/form-data; boundary=%@",boundary) let URL: NSURL = NSURL(string: "http://api-cc.appsence.net/v1/signs")! let request:NSMutableURLRequest = NSMutableURLRequest(URL:URL) request.HTTPMethod = "POST" let body : NSMutableData = NSMutableData() body.appendData(NSString(format: "\r\n--%@\r\n", boundary).dataUsingEncoding(NSUTF8StringEncoding)!) body.appendData(NSString(format:"Content-Disposition: form-data; name=\"profile_img\"; filename=\"img.jpg\"\\r\n").dataUsingEncoding(NSUTF8StringEncoding)!) body.appendData(NSString(format: "Content-Type: application/octet-stream\r\n\r\n").dataUsingEncoding(NSUTF8StringEncoding)!) body.appendData(imageData!) body.appendData(NSString(format: "\r\n--%@\r\n", boundary).dataUsingEncoding(NSUTF8StringEncoding)!) //fill text value here textBody = "date=\(date)&student_id=\(studentid)&guardian_id=\(guardianid)&type=\(type)" print("text body : \(textBody!)") let bodyTextData = textBody!.dataUsingEncoding(NSUTF8StringEncoding); body.appendData(bodyTextData!) request.addValue(contentType as String, forHTTPHeaderField: "Content-Type") // if data string use data using encoding request.HTTPBody = body NSURLSession.sharedSession().dataTaskWithRequest(request){ (data:NSData?, response:NSURLResponse?, error:NSError?) -> Void in if error == nil{ print("sukses : \(NSString(data: data!, encoding: NSUTF8StringEncoding)!)") }else{ print("ini error save \(NSString(data: data!, encoding: NSUTF8StringEncoding)!)") } }.resume() } 

我该如何解决这个问题？

Answer 1

Alamofire 3+

  // import Alamofire func uploadWithAlamofire() { let image = UIImage(named: "myPhoto")! // define parameters let parameters = [ "hometown": "bodrum", "living": "izmir" ] // Begin upload Alamofire.upload(.POST, "upload_url", // define your headers here headers: ["Authorization": "auth_token"], multipartFormData: { multipartFormData in // import image to request if let imageData = UIImageJPEGRepresentation(image, 1) { multipartFormData.appendBodyPart(data: imageData, name: "file", fileName: "myImage.png", mimeType: "image/png") } // import parameters for (key, value) in parameters { multipartFormData.appendBodyPart(data: value.dataUsingEncoding(NSUTF8StringEncoding)!, name: key) } }, encodingMemoryThreshold: Manager.MultipartFormDataEncodingMemoryThreshold, encodingCompletion: { encodingResult in switch encodingResult { case .Success(let upload, _, _): upload.responseJSON { result in debugPrint(result) } case .Failure(let encodeError): print(encodeError) } }) } 

Answer 2

在我的一个应用程序中，我在下面的方法中将图像发布到server.Below是客观的C语法。 但是你可以在swift中使用相同的方法

1）将图像转换为base 64 string NSData * imageData = UIImageJPEGRepresentation（<＃UIImage * _Nonnull image＃>，<#CGFloat compressionQuality＃>）; NSString * base64String = [imageData base64EncodedStringWithOptions：0];

2）创建一个字典并将base 64字符串添加到字典中

NSMutableDictionary * imagedict = [[NSMutableDictionary alloc] init];

  [imagedict setObject:base64String forKey:@"image"]; 

3）转换为json并使用nsurl会话将其发布到您的服务器
NSData * incidentData = [NSJSONSerialization dataWithJSONObject：imagedict options：0 error：＆err];

4）您的服务器将以json的forms接收请求并解析它以获取图像并将基本64字符串转换回图像