How to POST data from multiple view controllers to server with JSON using SWIFT

Question

I need help with combining data collected from firstVC, secondVC, and thirdVC and serializing those in the fourthVC.

This link helps with one VC but I have to send only ONE FILE of JSON DATA to the server.

How to create and send the json data to server using swift language

The other method is passing a dictionary array from firstVC, secondVC, and thirdVC to the fourthVC and from the fourthVC convert the dictionaries into JSON. But i don't know how to do that.

I used the format from the answer provided in the link above, but if you need additional info, I will gladly cooperate. Thanks!

PS. Please give me useful comments that will help in any way. I need the code and not feedbacks like doing my own research and such cause I have been stressing about this for nearly a month now.

This is the UserDefault keys

 if let AC = UserDefaults.standard.value(forKey: "Acc") as? String {
        labeltext.text = "\(AC)"
    }

    if let TY = UserDefaults.standard.value(forKey: "Taxyear") as? String {
        taxtext.text = "\(TY)"
    }
    if let BB = UserDefaults.standard.value(forKey: "Bsb") as? String {
        bsbtext.text = "\(BB)"
    }

Here is my JSON code

@IBAction func save(_ sender: Any){
    typealias JSONDictionary = [String:Any]

    let parameters = ["BankAccountNumber": "Acc", "Tax Year": "Taxyear", "my-bsb": "Bsb"]

    let url = URL(string: "https://server:port/")! //change the url

    //create the session object
    let session = URLSession.shared

    //now create the URLRequest object using the url object
    var request = URLRequest(url: url)
    request.httpMethod = "POST" //set http method as POST


   let valid = JSONSerialization.isValidJSONObject(parameters) // true

    print (valid)

    do {
        request.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted) // pass dictionary to nsdata object and set it as request body

    } catch let error {
        print(error)
    }
      request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.addValue("application/json", forHTTPHeaderField: "Accept")

    //        create dataTask using the session object to send data to the server
    let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in

        guard error == nil else {
            return
        }
        guard let data = data else {
            return
        }

        do {
            //create json object from data
            if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
                print(json)
                // handle json...
            }

        } catch let error {
            print(error.localizedDescription)
        }
    })
    task.resume()

    let alertMessage = UIAlertController(title: "Saved!", message: "We have recorded your information", preferredStyle: UIAlertControllerStyle.alert)

    let action = UIAlertAction(title:"Okay", style: UIAlertActionStyle.default, handler: nil)

    alertMessage.addAction(action)

    self.present(alertMessage, animated: true, completion: nil)

}

You pass the data from VC1 to VC2, you can create a property in VC2 and when you push from VC1 to VC2 set that property value, and from VC2 to VC3 also do the same till VC4. What is the problem ? — vivekDas
– vivekDas, Commented Aug 6, 2018 at 5:20
are you able to collect data from all viewControllers? If yes, can you share that along with the JSON structure you want to post? — Kamran
– Kamran, Commented Aug 6, 2018 at 5:20
Let the others to know about your key value structure to prepare data in json, so they can help. — vaibhav
– vaibhav, Commented Aug 6, 2018 at 5:30
@vivekDas Thanks for replying! I can pass data by using userdefaults. But I don't know how I can convert the keys into JSON. So I am open to any other alternatives — booak55
– booak55, Commented Aug 6, 2018 at 6:16
@Kamran Thanks for your suggestion. I've updated my question. I passed the values through using userdefaults — booak55
– booak55, Commented Aug 6, 2018 at 6:18

booak55 · Accepted Answer · 2018-08-16 00:45:45Z

0

I solved it by first storing them in a variable

var TITLE = UserDefaults.standard.value(forKey: "Title")
var GN = UserDefaults.standard.value(forKey: "GivenNames")
var LN = UserDefaults.standard.value(forKey: "LastName")

Then I placed them in a parameter and that's done. It was so obvious that I can't believe I didn't solve it sooner

@IBAction func save(_ sender: Any){

    let parameters = ["Tax Year": TaxYear, "Title": TITLE, "first-name": GN, "sur-name": LN]

answered Aug 16, 2018 at 0:45

booak55

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