Saving text from a UITextView using core data Swift - ios

Question

Completely new to iOS Development and Swift so I hope you'll bear with me. I'm creating a simple note app based off the apple Notes app.
I am also completely new to core data. What I'm trying to do is save the text from the UITextView. Strangely enough this works but only after I remove this piece of code,
if let detail: Note = self.detailItem {
if let textView = self.textView {
textView.text = detail.noteText
}
create a new note, then reintroduce the code...
func configureView() {
// Update the user interface for the detail item.
if let detail: Note = self.detailItem {
if let label = self.detailDescriptionLabel {
label.text = detail.timeStamp.description
}
if let detail: Note = self.detailItem {
if let textView = self.textView {
textView.text = detail.noteText
}
}
}
For a note that has already been created, this code is able to save the text in the textView. If I try to create a new note and then open it, the code above will crash the app.
This error comes up: Thread 1: EXC_BAD_ACCESS(code=1, address=0x0)
I think I have made a silly mistake like not initializing my model "Note.swift" class.
I'm using the boilerplate code for a master detail app with core data. I also have two "insertNewObject" functions. One is in the MasterViewController and the other is in the DetailViewController.
DetailViewController.swift
func insertNewObject(sender: AnyObject) {
let context = self.fetchedResultsController.managedObjectContext
let entity = self.fetchedResultsController.fetchRequest.entity!
let newManagedObject = NSEntityDescription.insertNewObjectForEntityForName(entity.name!, inManagedObjectContext: context) as! NSManagedObject
Here's the full code including the fetchedResultsController.
func insertNewObject(sender: AnyObject) {
let context = self.fetchedResultsController.managedObjectContext
let entity = self.fetchedResultsController.fetchRequest.entity!
let newManagedObject = NSEntityDescription.insertNewObjectForEntityForName(entity.name!, inManagedObjectContext: context) as! NSManagedObject
// If appropriate, configure the new managed object.
// Normally you should use accessor methods, but using KVC here avoids the need to add a custom class to the template.
newManagedObject.setValue(self.textView.text, forKey: "noteText")
newManagedObject.setValue("I changed", forKey: "noteTitle")
// Save the context.
var error: NSError? = nil
if !context.save(&error) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
//println("Unresolved error \(error), \(error.userInfo)")
abort()
}
}
// MARK: - Fetched results controller
var fetchedResultsController: NSFetchedResultsController {
if _fetchedResultsController != nil {
return _fetchedResultsController!
}
let fetchRequest = NSFetchRequest()
// Edit the entity name as appropriate.
let entity = NSEntityDescription.entityForName("Note", inManagedObjectContext: self.managedObjectContext!)
fetchRequest.entity = entity
// Set the batch size to a suitable number.
fetchRequest.fetchBatchSize = 20
// Edit the sort key as appropriate.
let sortDescriptor = NSSortDescriptor(key: "timeStamp", ascending: false)
let sortDescriptors = [sortDescriptor]
fetchRequest.sortDescriptors = [sortDescriptor]
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
let aFetchedResultsController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: self.managedObjectContext!, sectionNameKeyPath: nil, cacheName: "Master")
aFetchedResultsController.delegate = self
_fetchedResultsController = aFetchedResultsController
var error: NSError? = nil
if !_fetchedResultsController!.performFetch(&error) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
//println("Unresolved error \(error), \(error.userInfo)")
abort()
}
return _fetchedResultsController!
}
var _fetchedResultsController: NSFetchedResultsController? = nil
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillDisappear(animated: Bool) {
detailItem!.noteText = self.textView.text
detailItem!.noteTitle = "I changed"
var error: NSError? = nil
if !self.managedObjectContext!.save(&error) {
abort()
}
}

Answer 1

I was able to figure it out. The issue was that I didn't set a value for "noteText" when I first called func insertNewObject(sender: AnyObject). This resulted in a nil being set to textView.text and therefore crashing the app. Thanks for your help #BaseZen!