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Uploading multiple image files with Swift

由 北城余情 提交于 2019-12-01 12:22:12
Anit Kumar
import MobileCoreServices


func createRequest(userid: String, image: [UIImage]) throws -> NSMutableURLRequest {

   var parameters: [String : AnyObject] = [
       "userid": userid,
       "Image1": image[0],  // You need to set the UIImage Type image parameters 
       "Image2": image[1],   
       "Image3": image[2],
       "Image4": image[3]
   ]

    print(parameters)

    let boundary = generateBoundaryString()

    let url = URL(string: Your URL String)!
    let request = NSMutableURLRequest(url: url)
    request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")

    request.httpBody = try createBody(with: parameters as [String : AnyObject], boundary: boundary)

    return request
}

Here is Code of Upload Image and Parameters in multipart/form-data 

func createBody(with parameters: [String: AnyObject], boundary: String) throws -> Data {

    var body = Data()

    for (key, value) in parameters {

        if(value is String || value is NSString) {
            body.append("--\(boundary)\r\n")
            body.append("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
            body.append("\(value)\r\n")
        }else if let image = value as? UIImage {
            let r = arc4random()
            let filename = "image\(r).jpg"
            let data = UIImageJPEGRepresentation(image,1);
            let mimetype = mimeTypeForPath(path: filename)

            body.append("--\(boundary)\r\n")
            body.append("Content-Disposition: form-data; name=\"\(key)\"; filename=\"\(filename)\"\r\n")
            body.append("Content-Type: \(mimetype)\r\n\r\n")
            body.append(data!)
            body.append("\r\n")
        }

    }

    body.append("--\(boundary)--\r\n")

    return body

}

func mimeTypeForPath(path: String) -> String {
    let pathExtension = path.pathExtension
    var stringMimeType = "application/octet-stream";
    if let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, pathExtension as! CFString, nil)?.takeRetainedValue() {
        if let mimetype = UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType)?.takeRetainedValue() {
            stringMimeType = mimetype as NSString as String
        }
    }
    return stringMimeType;
}

extension String {
   var ns: NSString {
       return self as NSString
   }
   var pathExtension: String? {
       return ns.pathExtension
   }
   var lastPathComponent: String? {
       return ns.lastPathComponent
   }
}

The only thing that looks wrong to me is that you're not creating the initial boundary properly. You should NOT have a CRLF at the beginning of the first boundary. I would try the following instead.

let uploadData = NSMutableData()

for (index, (key, value)) in enumerate(parameters) {
    if index == 0 {
        uploadData.appendData("--\(boundaryConstant)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
    } else {
        uploadData.appendData("\r\n--\(boundaryConstant)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
    }

    if let postData as? NetData {
        var filenameClause = " filename=\"\(postData.filename)\""
        let contentDispositionString = "Content-Disposition: form-data; name=\"\(key)\";\(filenameClause)\r\n"
        let contentDispositionData = contentDispositionString.dataUsingEncoding(NSUTF8StringEncoding)
        uploadData.appendData(contentDispositionData!)

        let contentTypeString = "Content-Type: \(postData.mimeType.getString())\r\n\r\n"
        let contentTypeData = contentTypeString.dataUsingEncoding(NSUTF8StringEncoding)
        uploadData.appendData(contentTypeData!)
        uploadData.appendData(postData.data)
    }
}

uploadData.appendData("\r\n--\(boundaryConstant)--\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)

In Swift Using Alamofire Just append "[]" with image upload Param Name to make it array of images. Following is the demo code where I am using "[]" with images upload's param name and creating a loop to same param name. ;-)

func uploadImages(withImagesData imagesData: [Foundation.Data], parameters: [String: String]) {
    Alamofire.upload(multipartFormData: { multipartFormData in
                // import image to request
                for imageData in imagesData {
                    multipartFormData.append(imageData, withName: "myImageParamName[]", fileName: "\(Date().timeIntervalSince1970).jpeg", mimeType: "image/jpeg")
                }
                for (key, value) in parameters {
                    multipartFormData.append(value.data(using: String.Encoding.utf8)!, withName: key)
                }
            }, to: urlString,

                encodingCompletion: { encodingResult in
                    switch encodingResult {
                    case .success(let upload, _, _):
                        upload.responseJSON { response in
                            print("upload Success")
                        }
                    case .failure(let error):
                        print("upload Failed With Error: ", error)
                    }

            })
}
标签
iphone
xcode
swift
image-uploading
alamofire
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