How do I pass an array in a swift json request - php

Question

How can I pass an array to my Php backend using swift. Do i have to for loop each value and append it to the request body?
Here is my code
let url = URL(string: "url.com/page")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
let id = user?["id"] as! String
let party = partyName.text!
let body = "id=\(id)&party_name=\(party)&party_invited=\(usersInvited)"
//********--usersInvited-- is the array i want to pass
request.httpBody = body.data(using: String.Encoding.utf8)
URLSession.shared.dataTask(with: request, completionHandler: { (data:Data?, response:URLResponse?, error:Error?) in
DispatchQueue.main.async(execute: {
if error == nil{
do{
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
guard let parseJSON = json else{
print("Error while parsing")
return
}
print(parseJSON["status"])
} catch{
print("Caught an error: \(error)")
}
} else{
print("Error: \(error)")
}
})
}).resume()
But that code sends the array as one whole string with an output like this: ["57", "60"]

Answer 1

I'm guessing, but it looks like you want to JSON encode your array, but as a URL parameter?
(I've assumed that usersInvited is an array of strings)
You could go via JSONSerialisation?
let data = try! JSONSerialization.data(withJSONObject: usersInvited, options: [])
let string = String(data: d, encoding: .utf8)!
let body = "id=\(id)&party_name=\(party)&party_invited=\(string)"
Or if that's not quite what you want (you've got a space after the comma in your question), you could just do it by hand?
let string = "[" + usersInvited.map { "\"\($0)\"" }.joined(separator: ", ") + "]"
My vote would be to use option 1 and make your server accept what it outputs.
If you mean you want it to look like party_invited=1,2,3,4 then you could use joined to convert the array like this
let string = usersInvited.joined(separator: ",")
let body = "id=\(id)&party_name=\(party)&party_invited=\(string)"
If you mean you want this party_invited=1&party_invited=2&party_invited=3 then you can use map and joined
let string = usersInvited.map { "party_invited=\($0)" }.joined(separator: "&")
let body = "id=\(id)&party_name=\(party)&\(string)"