How to Convert Curl in iOS

I have this command that works:

curl -X POST -H -i -F userPic=@/Users/path/to/image.png http://server.com/users/userPic/6

      

        
        
        
      

    

I am writing my program in Swift and I am trying to get this same command to send some image data with a POST request to my server. I am confused how to add the userPic = @ request part to my request. Currently my Swift code looks like this:

func sendUserPicToAPI() {
    if let savedId = defaults.stringForKey("UserId") {
        userId = savedId.toInt()
    }

    var imageData = UIImagePNGRepresentation(profPic.image)
    var url = NSURL(string: "http://server.com/users/userPic/\(userId)")
    var request = NSMutableURLRequest(URL: url!)
    request.HTTPMethod = "POST"
    request.HTTPBody = NSData(data: imageData!)

    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)")
}

      

        
        
        
      

    

I have referenced this StackOverflow question but I still haven't been able to get it to work. I am confused as to what I am doing wrong and if anyone knows how to do this correctly.