Swift - JSON data wont display in UITableview - ios

Question

I am trying to retrieve data from a server. I can display my data in the console.
I'm trying to display it in a UITableview but nothing happens.
I tried to create a local JSON file and I am able to display it, but when coming from the server it wont work.
let newUrl = URL(string: urlGetNotifications)
let configuration = URLSessionConfiguration.default
var session = URLSession.shared
var request = URLRequest(url: newUrl!)
session = URLSession(configuration: configuration)
request.httpMethod = "GET"
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.setValue(authkeyFCM, forHTTPHeaderField: "auth-key")
request.setValue(tokenFCM.string(forKey: "tokenFCM"), forHTTPHeaderField: "token")
let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
DispatchQueue.main.async {
guard let j = newUrl
else{
print("data not found")
return
}
guard let d = try? Data(contentsOf: j)
else { print("failed")
return
}
guard let rootJSON = try? JSONSerialization.jsonObject(with: d, options: [])
else{ print("failedh")
return
}
if let data = data, let dataString = String(data: data, encoding: .utf8) {
if let JSON = rootJSON as? [String: Any] {
print("data: \(dataString)")
guard let jsonArray = JSON["data"] as? [[String: Any]] else {
return
}
print(jsonArray)
let name = jsonArray[0]["type"] as? String
print(name ?? "NA")
print(jsonArray.last!["created_at"] as? String as Any)
self.notificationList = jsonArray.compactMap{return NotificationData($0)}
self.tableView.reloadData()
}
}
}
})
task.resume()

Answer 1

create a variable for the URL and create struct contain the all param
in the main add variable of type the struck then start fetch the data
var users: [User]() = []
func fetchUsers(using url: String){
let url = URL(string: url)!
let _ = URLSession.shared.dataTask(with: url){ (data,response,error)
in
guard let data = data else {return}
do{
let userFetch = try JSONDecoder().decode([Post].self, from: data) // decode * ( Codable )
self.users = userFetch
self.load(with: userFetch)
self.userCollection = userFetch
DispatchQueue.main.async {
self.collectionView.reloadData()
}
} catch{
print("error loading data cause: \(error)")
}
}.resume()
}

Answer 2

I figured it out
This one works
let newUrl = URL(string: urlGetNotifications)
let configuration = URLSessionConfiguration.default
var session = URLSession.shared
var request = URLRequest(url: newUrl!)
session = URLSession(configuration: configuration)
request.httpMethod = "GET"
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.setValue(authkeyFCM, forHTTPHeaderField: "auth-key")
request.setValue(tokenFCM.string(forKey: "tokenFCM"), forHTTPHeaderField: "token")
let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
DispatchQueue.main.async {
do {
let json = try JSONSerialization.jsonObject(with: data!, options: [])
//self.showSpinner(onView: self.view)
print("The Response is : ",json)
if let data = data, let dataString = String(data: data, encoding: .utf8) {
if let JSON = json as? [String: Any] {
print("dumaan ba dito")
print("data: \(dataString)")
guard let jsonArray = JSON["data"] as? [[String: Any]] else {
return
}
print(jsonArray)
let name = jsonArray[0]["type"] as? String
print(name ?? "NA")
print(jsonArray.last!["created_at"] as? String as Any)
self.notificationList = jsonArray.compactMap{return NotificationData($0)}
self.tableView.reloadData()
}
}
} catch {
print("JSON error: \(error.localizedDescription)")
}
} // end
})
task.resume()