UI TableView cell opening a new view with multiple data using coredata in swift - iphone

Question

as a beginner in iOS and Swift, I have a project that has to have a tableview with multiple cells, in which every cell contains several data types. i.e. Strings, dates etc., where in one view controller, there is the table view for viewing the cells, the second view controller is for creating a cell and entering the data, and the third view is for displaying the same data when clicking the cell. I've decided to store all of that using coredata since I was told it's most efficient and simple for beginners. I've used several tutorials on this matter but none of them handle this type of problem I have. Best example is how the Contact list works on iOS.
The code I've done so far is this:
var titleCellList = [NSManagedObject]()
var infoCellList = [NSManagedObject]()
class CellsViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
#IBOutlet var cellsTableView: UITableView!
//MARK: Default Functions
override func viewDidLoad() {
super.viewDidLoad()
title = "\"Lists\""
cellsTableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "Cell")
}
// Do any additional setup after loading the view.
}
// MARK: UITableViewDataSource
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return TitleCellList.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell") as! UITableViewCell
let cellTitle = titleCellList[indexPath.row]
cell.textLabel!.text = cellTitle.valueForKey("title") as? String
return cell
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewDidAppear(animated: Bool) {
cellsTableView.reloadData()
}
//MARK: Storing CoreData
func saveName(name: String) {
//1
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let managedContext = appDelegate.managedObjectContext!
//2
let entity = NSEntityDescription.entityForName("Data", inManagedObjectContext: managedContext)
let title = NSManagedObject(entity: entity!, insertIntoManagedObjectContext:managedContext)
//3
title.setValue(name, forKey: "title")
//4
var error: NSError?
if !managedContext.save(&error) {
println("Could not save \(error), \(error?.userInfo)")
}
//5
titleCellList.append(title)
}
//MARK: Fetching CoreData
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
//1
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let managedContext = appDelegate.managedObjectContext!
//2
let fetchRequest = NSFetchRequest(entityName:"Data")
//3
var error: NSError?
let fetchedResults = managedContext.executeFetchRequest(fetchRequest, error: &error) as? [NSManagedObject]
if let results = fetchedResults {
titleCellList = results
} else {
println("Could not fetch \(error), \(error!.userInfo)")
}
}
// MARK: Table Editing Methods
func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
let appDel:AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let context:NSManagedObjectContext = appDel.managedObjectContext!
context.deleteObject(titleCellList[indexPath.row] as NSManagedObject)
titleCellList.removeAtIndex(indexPath.row)
context.save(nil)
cellsTableView.reloadData()
}
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
tableView.deselectRowAtIndexPath(indexPath, animated: true)
let row = indexPath.row
println("Row: \(row)")
println(titleCellList[row])
performSegueWithIdentifier("checkCellSegue", sender: self)
}
Second View Controller (the one for creating a cell with data)
class AddNewViewController: UIViewController, UITextFieldDelegate {
#IBOutlet var titleTextField: UITextField!
#IBOutlet var shortInfoTextView: UITextView!
//MARK: Default Functions
override func viewDidLoad() {
super.viewDidLoad()
self.titleTextField.delegate = self
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
self.view.endEditing(true)
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
#IBAction func addDataButtonPressed(sender: UIButton) {
if titleTextField.text != "" {
CellsViewController().saveName(titleTextField.text)
titleTextField.text = ""
shortInfoTextView.text = ""
println("New title Added!")
}else {
println("No empty titles allowed!")
}
}
Now, most of this code is from a tutorial, and when I tried adding other data entity's, it didn't work. In the datamodel I currently have only 1 entity named "Data" which contains 4 models. So, to sum it up, I need to store 4 data models in one entity and load them on a different view controller when clicking on a cell which of course, has a title that the user wrote. And just to note, I've spent hours searching online for an answer so this is my last line so to say.
Any help would be greatly appreciated.

Answer 1

So, here is the one approach I used on this little issue. I basically just pass arguments with the prepareForSegue method, and inside of it I just pass the data I want to use in the other class/VC.
The Code:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
// Setter for Second VC, destination path --> var declarations in Second VC
if segue.identifier == "checkCellSegue" {
let destination = segue.destinationViewController as! SecondViewController
if let indexPath = self.tableView?.indexPathForCell(sender as! UITableViewCell) {
let object = fetchedResultsController?.objectAtIndexPath(indexPath) as? Data
destination.cellTitle = object?.cellTitle
destination.textViewInfo = object?.textViewInfo
destination.timerValue = object?.timerValue
}
}
So, first we declare the destination which is the name of our Second VC or whatever you named it. Then, since I am accessing data trough a TableView cell we need to fetch my CoreData Entity with the indexPath. After that the final declaration is the Model Class which has all the data values from the entity, which will work like a singleton.
destination.cellTitle // --> in the 2.nd VC we declared a new var called cellTitle, var cellTitle:String
object?.cellTitle // --> in the model class "Data.swift" the declaration is #NSManaged var cellTitle:String
So, thats it. I am still a little newbie on iOS so if there are any mistakes, just say so.