In this table view (override func tableView), I show points of interests, some loaded by default, others by the user. I can retrieve the name of the managed object, but when try to show the position, it fails.
I can't show the latitude and longitude in the TableViewCell. If I use the name keyword the name appears. Maybe I should do some kind of conversion from numbers, but where?
I also got this warning:
CoreData: warning: Unable to load class named 'PRODUCT_MODULE_NAME.ArcheoPOI' for entity 'ArcheoPOI'. Class not found, using default NSManagedObject instead.
This is my NSManagedContext
import UIKit
import CoreData
import CoreLocation
class AppiaTVC: UITableViewController, UITableViewDataSource, UITableViewDelegate {
var places : [NSManagedObject] = []
let myLocationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
//MARK : good way to set the reuse id of the cell
// tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "Cell") //alternative to put it in the
//MARK : good way to set the table title
title = "\"All the POI\""
}
//MARK: - Added for fetching data from CoreData
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
//1
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let managedContext = appDelegate.managedObjectContext! //needed to handel mangedObject (saving and fetching entries)
//2
let fetchRequest = NSFetchRequest(entityName:"ArcheoPOI")
//3
var error: NSError?
let fetchedResults = managedContext.executeFetchRequest(fetchRequest, error: &error) as? [NSManagedObject]
if let results = fetchedResults {
places = results
} else {
println("Could not fetch \(error), \(error!.userInfo)")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Potentially incomplete method implementation.
// Return the number of sections.
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete method implementation.
// Return the number of rows in the section.
return places.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("appiaCellID", forIndexPath: indexPath) as! AppiaTVCell
cell.backgroundColor = UIColor.blueColor()
if indexPath.row % 2 == 0 {
// cell.backgroundColor = UIColor(red: 143 / 255, green: 204 / 255, blue: 255 / 255, alpha: 1)
// cell.sweetTextView.backgroundColor = UIColor(red: 63 / 255, green: 159 / 255, blue: 255 / 255, alpha: 1)
} else {
// cell.backgroundColor = UIColor(red: 63 / 255, green: 159 / 255, blue: 255 / 255, alpha: 1)
// cell.sweetTextView.backgroundColor = UIColor(red: 143 / 255, green: 204 / 255, blue: 255 / 255, alpha: 1)
}
let singlePlace = places[indexPath.row]
//KVC is the only way to access data in CoreData (can't use a property) butwe could also use a more natural object-style person.name
// cell.textLabel!.text = singlePlace.valueForKey("name") as? String
cell.cellNameLabel.text = singlePlace.valueForKey("name") as? String
cell.cellLatitudeLabel.text = singlePlace.valueForKey("latitude") as? String //if I use "name" it works
cell.cellLongitudeLabel.text = singlePlace.valueForKey("longitude") as? String //if I use "name" it works
return cell
}
@IBAction func addPlaceButtonPressed(sender: UIBarButtonItem) {
var alert = UIAlertController(title: "New place", message: "Add a new place", preferredStyle: .Alert)
let saveAction = UIAlertAction(title: "Save", style: .Default) { (action: UIAlertAction!) -> Void in
let textField = alert.textFields![0] as! UITextField
self.saveName(textField.text) //self.names.append(textField.text)
self.tableView.reloadData()
}
let cancelAction = UIAlertAction(title: "Cancel", style: .Default) { (action: UIAlertAction!) -> Void in
}
alert.addTextFieldWithConfigurationHandler {
(textField: UITextField!) -> Void in
}
alert.addAction(saveAction)
alert.addAction(cancelAction)
presentViewController(alert,
animated: true,
completion: nil)
}
//MARK: - save data to CoreData - this function is called by the addName button
func saveName(name: String) {
//1
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let managedContext = appDelegate.managedObjectContext!
//2
let entity = NSEntityDescription.entityForName("ArcheoPOI", inManagedObjectContext: managedContext) //NSEntityDescription is required
let place = NSManagedObject(entity: entity!, insertIntoManagedObjectContext:managedContext)
myLocationManager.startUpdatingLocation()
let lat = myLocationManager.location.coordinate.latitude
let lon = myLocationManager.location.coordinate.longitude
myLocationManager.stopUpdatingLocation()
println("************************")
println(lat)
println(lon)
println("************************")
//3
place.setValue(name, forKey: "name")
place.setValue(lat, forKey: "latitude")
place.setValue(lon, forKey: "longitude")
//4
var error: NSError?
if !managedContext.save(&error) {
println("Could not save \(error), \(error?.userInfo)")
}
//5
places.append(place)
}
//MARK - delete NSManagedObject
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
switch editingStyle {
case UITableViewCellEditingStyle.Delete:
// remove the deleted item from the model
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let managedContext:NSManagedObjectContext = appDelegate.managedObjectContext!
managedContext.deleteObject(places[indexPath.row] as NSManagedObject)
places.removeAtIndex(indexPath.row)
managedContext.save(nil)
//tableView.reloadData()
// remove the deleted item from the `UITableView`
self.tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
default:
return
}
}
@IBAction func BackButtonPressed(sender: UIBarButtonItem) {
dismissViewControllerAnimated(true , completion: nil)
}
}
