如何用Swift在iOS中上传图像到服务器？

Question

它不会工作，如何从iOS Swift应用程序发送图像到我的PHP服务器？

@IBAction func upload(sender: UIButton) {

    var imageData = UIImageJPEGRepresentation(img.image, 90)
   // println(imageData)
    let url = NSURL(string:"http://www.i35.club.tw/old_tree/test/uplo.php")
    //let cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData
    //var request = NSMutableURLRequest(URL: url, cachePolicy: cachePolicy, timeoutInterval: 10)
    var request = NSMutableURLRequest(URL: url)
    request.HTTPMethod = "POST"

    // set Content-Type in HTTP header
    let boundaryConstant = "----------V2ymHFg03esomerandomstuffhbqgZCaKO6jy";
    let contentType = "multipart/form-data; boundary=" + boundaryConstant
    NSURLProtocol.setProperty(contentType, forKey: "Content-Type", inRequest: request)
    request.HTTPBody = imageData
    // set data
    //var dataString = "adkjlkajfdadf"
    //let requestBodyData = (dataString as NSString).dataUsingEncoding(NSUTF8StringEncoding)
    //request.HTTPBody = requestBodyData


    //

    request.addValue(contentType, forHTTPHeaderField: "Content-Type")
    request.addValue("multipart/form-data", forHTTPHeaderField: "Accept")
    //
    // set content length

    //NSURLProtocol.setProperty(requestBodyData.length, forKey: "Content-Length", inRequest: request)

    var response: NSURLResponse? = nil
    var error: NSError? = nil
    let reply = NSURLConnection.sendSynchronousRequest(request, returningResponse:&response, error:&error)

    let results = NSString(data:reply!, encoding:NSUTF8StringEncoding)
    println("API Response: \(results)")
}

//take photo
func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!) {


    var selectedImage : UIImage = image
     img.image = selectedImage
    UIImageWriteToSavedPhotosAlbum(selectedImage, nil, nil, nil)
    self.dismissViewControllerAnimated(true, completion: nil)

}

Answer 1

我已经根据用户的选择拍摄了照片，并为swift 2和iOS9编写了代码

    func imageUploadRequest(imageView imageView: UIImageView, uploadUrl: NSURL, param: [String:String]?) {

        //let myUrl = NSURL(string: "http://192.168.1.103/upload.photo/index.php");

        let request = NSMutableURLRequest(URL:uploadUrl);
        request.HTTPMethod = "POST"

        let boundary = generateBoundaryString()

        request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")

        let imageData = UIImageJPEGRepresentation(imageView.image!, 1)

        if(imageData==nil)  { return; }

        request.HTTPBody = createBodyWithParameters(param, filePathKey: "file", imageDataKey: imageData!, boundary: boundary)

        //myActivityIndicator.startAnimating();

        let task =  NSURLSession.sharedSession().dataTaskWithRequest(request,
            completionHandler: {
                (data, response, error) -> Void in
                if let data = data {

                    // You can print out response object
                    print("******* response = \(response)")

                    print(data.length)
                    // you can use data here

                    // Print out reponse body
                    let responseString = NSString(data: data, encoding: NSUTF8StringEncoding)
                    print("****** response data = \(responseString!)")

                    let json =  try!NSJSONSerialization.JSONObjectWithData(data, options: .MutableContainers) as? NSDictionary

                    print("json value \(json)")

                    //var json = NSJSONSerialization.JSONObjectWithData(data, options: .MutableContainers, error: &err)

                    dispatch_async(dispatch_get_main_queue(),{
                        //self.myActivityIndicator.stopAnimating()
                        //self.imageView.image = nil;
                    });

                } else if let error = error {
                    print(error.description)
                }
        })
        task.resume()


    }


    func createBodyWithParameters(parameters: [String: String]?, filePathKey: String?, imageDataKey: NSData, boundary: String) -> NSData {
        let body = NSMutableData();

        if parameters != nil {
            for (key, value) in parameters! {
                body.appendString("--\(boundary)\r\n")
                body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
                body.appendString("\(value)\r\n")
            }
        }

        let filename = "user-profile.jpg"

        let mimetype = "image/jpg"

        body.appendString("--\(boundary)\r\n")
        body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n")
        body.appendString("Content-Type: \(mimetype)\r\n\r\n")
        body.appendData(imageDataKey)
        body.appendString("\r\n")

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

        return body
    }

    func generateBoundaryString() -> String {
        return "Boundary-\(NSUUID().UUIDString)"
    }

}// extension for impage uploading

extension NSMutableData {

    func appendString(string: String) {
        let data = string.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
        appendData(data!)
    }
}

------以下php端代码

<?php

$firstName = $_POST["firstName"];
$lastName = $_POST["lastName"];
$userId = $_POST["userId"];

$target_dir = "media";

if(!file_exists($target_dir))
{
mkdir($target_dir, 0777, true);
}

$target_dir = $target_dir . "/" . basename($_FILES["file"]["name"]);

if (move_uploaded_file($_FILES["file"]["tmp_name"], $target_dir)) 
{
echo json_encode([
"Message" => "The file ". basename( $_FILES["file"]["name"]). " has been uploaded.",
"Status" => "OK",
"userId" => $_REQUEST["userId"]
]);

} else {

echo json_encode([
"Message" => "Sorry, there was an error uploading your file.",
"Status" => "Error",
"userId" => $_REQUEST["userId"]
]);

}