Swift 5 - UrlSession - Post request starts with array - swift

Question

I am new about Swift. And I have question.I have to post a request starts with an array.
like this:
[{"columnName":"","columnLogic":"LIKE","columnValue":""}]
I tried with postman and return value which I wanted to.
Normally if it doesn't start with "[" and then I can post request and get back value. But Start with "[" and I tried many things not succeded :( please help me! I add my code which I use starts with "{" json post, this codes return error.`
private func getDataCars(){
struct Result: Codable {
let status: String
let document: DocumentStruct
}
struct DocumentStruct : Codable {
let pageno: Int
let total_count: String
let records: [RecordStruct]
}
struct RecordStruct: Codable{
let user_id:String
let user_name:String
let user_mail:String
let user_password:String
let user_phone:String
let user_durum:String
}
let parameters = [["columnName": "nameofcolumn", "columnLogic": "LIKE", "columnValue": "searchstring"]]
let url = URL(string: "http://getapiadress")!
let AuthTokenString = "somekey"
let session = URLSession.shared
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.addValue("Bearer " + AuthTokenString, forHTTPHeaderField: "Authorization")
do {
request.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted) // pass dictionary to data object and set it as request body
} catch let error {
print(error.localizedDescription)
}
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = session.dataTask(with: request, completionHandler: { data, response, error in
guard error == nil else {return}
guard let data = data else {return}
var result: Result?
do{
result=try JSONDecoder().decode(Result.self, from: data)
}
catch{
print("failed")
print(error)
}
guard let json = result else {
return
}
print(json.document.records[0].car_marka)
})
task.resume()
}`
here is my response of post request:
{
"status": "success",
"code": 1,
"message": "users found",
"document": {
"pageno": "1",
"pagesize": "30",
"total_count": "1",
"records": [
{
"user_id": "1",
"user_name": "Boss",
"user_mail": "boss#boss.com",
"user_password": "boss",
"user_phone": "123456789",
"user_durum": "admin"
}
]
}
}

Answer 1

If you want to send a dictionary as you mentioned at the beginning but you get a run-time error while trying to declare a JSON variable in XCode
[{"columnName":"","columnLogic":"LIKE","columnValue":""}]
Then in your code, you can do like this
// this is the dictionary format in Swift
let parameters = ["columnName": "","columnLogic": "LIKE","columnValue": ""]
do {
// This step will convert your dictionary to jsonData
let jsonData = try? JSONSerialization.data(withJSONObject: parameters)
request.httpBody = jsonData
} catch let error {
print(error.localizedDescription)
}
BUT Then if you want to make a POST request with an Array of objects then you can do something like this
struct ColumnInfo: Codable {
let columnName: String
let columnLogic: String
let columnValue: String
}
let parameters = [ColumnInfo(columnName: "nameofcolumn", columnLogic: "LIKE", columnValue: "searchstring")]
let url = URL(string: "http://getapiadress")!
let AuthTokenString = "somekey"
let session = URLSession.shared
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.addValue("Bearer " + AuthTokenString, forHTTPHeaderField: "Authorization")
do {
let jsonEncoder = JSONEncoder()
jsonEncoder.outputFormatting = .prettyPrinted
request.httpBody = try jsonEncoder.encode(parameters) // pass dictionary to data object and set it as request body
} catch let error {
print(error.localizedDescription)
}