How to access a Particular Value from a struct - ios

Question

I created a struct UserModel.swift to store the json data:-
struct UserModel {
var id: Int = 0
var uuid:Int = 0
var user_name: String = ""
var password: String = ""
var name: String = ""
var email: String = ""
init(json: [String:Any]) {
if let obj = json["id"] as? Int {
self.id = obj
}
if let obj = json["uuid"] as? Int {
self.uuid = obj
}
if let obj = json["user_name"] as? String {
self.user_name = obj
}
if let obj = json["name"] as? String {
self.name = obj
}
if let obj = json["email"] as? String {
self.email = obj
}
}
}
Now I used Alamofire to get the json in my ViewController.Swift file and I stored my struct by creating a variable I am successfully get the json and stored it in my struct.
var userModel = [UserModel]()
private func getList() {
progressHUD.show(in: view, animated: true)
// let uuid = UserDefaults.standard.integer(forKey: "uuid")
Alamofire.request(Constants.API.url("list_request?device_token=\(device_token ?? "")&uuid=794849"), method: .get, parameters: nil, encoding: JSONEncoding.default, headers: nil).responseJSON {
(response:DataResponse<Any>) in
self.progressHUD.dismiss()
guard let json = response.result.value as? [String:Any] else {return}
guard let data = json["data"] as? [[String:Any]] else {return}
printD(data)
guard let status = json["status"] as? Bool else { return}
printD(status)
if status == true {
guard let data = json["data"] as? [[String:Any]] else {return}
for userData in data {
self.userModel.append(UserModel(json: userData))
printD(self.userModel)
}
CommonClass.shared.showSuccessMessage("\(json["msg"] as? String ?? "")", inViewController: self)
}
else if status == false {
CommonClass.shared.showErrorMessage("\(json["msg"] as? String ?? "")", inViewController: self)
}
else {
CommonClass.shared.showErrorMessage("Server Connection Error. Please try again later", inViewController: self)
}
self.tableView.reloadData()
}
}
Now the problem I am getting I have to use my userModel data in another api in same class and I don't know How Can I do that. In rejectRequest() function I need to access some of my struct data but I don't know how can I do that. Please help?
private func rejectRequest() {
let user = userModel // I need to use userModel data for parameter
let param: [String:Any] = ["from_user": "", "to_user": "", "request_id": "", "device_token": device_token ?? ""]
Alamofire.request(Constants.API.url("end_request"), method: .post, parameters: param, encoding: JSONEncoding.default, headers: nil).responseJSON {
(response:DataResponse<Any>) in
}
}

Answer 1

Create a struct to hold common data that is shared across the app. Here's a sample for a DataController that can hold different models or arrays / dicts of models:
struct DataController {
// MARK: - User management
struct Users {
static var users: [User] = []
static var currentUser: User = User()
static func addUser(_ user: User) {
users.append(user)
}
static func findUserById(_ id: Int) -> User? {
// Find the users that match the id (should only be one!)
let users = user.filter { $0.id = id }
return users.count == 1 ? users[0] : nil
}
}
}
Add a user:
DataController.Users.addUser(user)
Access from elsewhere by:
DataController.Users.currentUser
Find a user by an id:
if let user = DataController.Users.findUserById(id) {
... do stuff ...
}
Incidentally, might be simpler to use a guard statement when parsing your JSON data:
init(json: [String:Any]) {
guard
let id = json["id"] as? Int,
let uuid = json["uuid"] as? Int,
let user_name = json["user_name"] as? String,
let name = json["name"] as? String,
let email = json["email"] as? String
else {
return // Fail
}
self.id = id
self.uuid = uuid
self.user_name = user_name
self.name = name
self.email = email
}