How to receive data of subitens from a plist?

Question

Good! I’m having trouble receiving sub data from my plist. Note... This is my directory.plist:

I want to throw it all in this one Main.storyboard:

Whereas the Keys Position and Name would be in the first Tableviewcontroller and the Keys Functionary, ImageFace and Phone would stay on Monday Tableviewcontroller.

For that I did the following:

1. I added to the Appdelegate the following:

   func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
       if let url = Bundle.main.url(forResource: "directory", withExtension: "plist"), let array = NSArray(contentsOf: url) as? [[String:Any]] {
           Shared.instance.employees = array.map{Employee(dictionary: $0)}
   }
   return true
   

2. My Struct got that way:

   struct EmployeeDetails {
       let functionary: String
       let imageFace: String
       let phone: String
   
       init(dictionary: [String: Any]) {
           self.functionary = (dictionary["Functionary"] as? String) ?? ""
           self.imageFace = (dictionary["ImageFace"] as? String) ?? ""
           self.phone = (dictionary["Phone"] as? String) ?? ""
       }
   }
   
   struct Employee {
       let position: String
       let name: String
       let details: [EmployeeDetails] // [String:Any]
   
       init(dictionary: [String: Any]) {
       self.position = (dictionary["Position"] as? String) ?? ""
       self.name = (dictionary["Name"] as? String) ?? ""
   
       let t = (dictionary["Details"] as? [Any]) ?? []
       self.details = t.map({EmployeeDetails(dictionary: $0 as! [String : Any])})
       }
   }
   
   struct Shared {
       static var instance = Shared()
       var employees: [Employee] = []
   }
   

3. Man first tableviewcontroller, was like this:

   class Page1: UITableViewController {
   
   override func viewDidLoad() {
       super.viewDidLoad()
   
       let anEmployee = Shared.instance.employees[1]
   
       print("Name:", anEmployee.name)
       print("Position:", anEmployee.position)
   
       anEmployee.details.forEach({
   
           print("Functionary:", $0.functionary)
           print("ImageFace:", $0.imageFace)
           print("Phone:", $0.phone)
       })
   }
   
   override func numberOfSections(in tableView: UITableView) -> Int {
   return 1
   }
   
   override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
       return Shared.instance.employees.count
   }
   
   override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
       let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell1
   
           cell.nameLabel.text = Shared.instance.employees[indexPath.row].name
           cell.positionLabel.text = Shared.instance.employees[indexPath.row].position
   
           return cell
       }
   
   override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
       if let destination = segue.destination as? Page2,
           let indexPath = tableView.indexPathForSelectedRow {
           destination.newPage = Shared.instance.employees[indexPath.row].details[indexPath.row]
           tableView .deselectRow(at: indexPath, animated: true)
           }
       }
   }
   

4. Man according to Tableviewcontroller, was like this:

   var newPage: EmployeeDetails! //recently added
   
   class Page2: UITableViewController {
   
   var newPage: EmployeeDetails!
   
   override func viewDidLoad() {
       super.viewDidLoad()
   
       if let theEmployee = newPage {
           self.title = theEmployee.name
       }
   }
   
   override func numberOfSections(in tableView: UITableView) -> Int {
       return 1
   }
   
   override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
       if let theEmployee = newPage {
           return theEmployee.details.count
       }
   return 0
   }
   
   override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
       let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell2
   
       if let theEmployee = newPage {
   
           cell.faceImage.image = theEmployee.details[indexPath.row].imageFace as? UIImage // did not work
           cell.functionary.text = theEmployee.details[indexPath.row].functionary
           cell.phoneLabel.text = theEmployee.details[indexPath.row].phone
       }
       return cell
       }
   }
   

After the changes, the project has no more errors, but the 2nd Tableviewcontroller remains empty! The Debug Area says the following:

2017-03-28 17:16:28.456 plist sample[7138:425253] Unknown class Page2 in Interface Builder file.

Any idea?

From now on, thank you.

Answer 1

Hello,

I believe your first problem ("Está retornando nil") is that the property details in your struct Employee is a dictionary like [String:Any], but in her . plist she is a array of dictionaries. Therefore, the correct one would be [[String:Any]].

Your second problem is related to the first, because if the details is an array, it does not have the subscript that you reference (what generates this Compile error).

So, the correct syntax for you to extract the value from the field of your . plist (as it is, ipsis literis) would be (example):

cell.faceImage.image = Shared.instance.employees[indexPath.row].details[<!INDEX!>]["ImageFace"]

Substitute <!INDEX!> to the correct index.

UPDATE

To send the selected object in its first VC to the second VC, you must implement both methods func prepare(for segue: UIStoryboardSegue, sender: Any?) and func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath).

Examples:

1) When selecting a cell from the table:

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let object = Shared.instance.employees[indexPath.row]
    self.performSegue(withIdentifier: "ID_DA_SEGUE_AQUI", sender: object)
}

2) Load the next table with the selected data:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if  let proximoVc = segue.destination as?  {
        proximoVc.newPage = sender as? EmployeeDetails
    }
}

Obs.: The above code can generate a crash if the index in the search inside the array is not correct. Check that the references are correct before proceeding.