iOS: CoreData save and search NSEntityDescription or kSetAttrDescription - ios

Question

Im new to Objective-C and CoreData and want to learn it and im trying in Xcode 5, im trying to make this tutorial.
I have followed it with some other CoreData table name, but i get some errors with my "ViewController.m" and dont know what to changes, i can see it recomment to changes "NSEntityDescription" to "kSetAttrDescription" but dont know if thats right or wrong to do, hope someone can tell mewhat to do - so i know it next time.
Error issues
Error Descriptions
My ViewController.m code.
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//Save data as CoreData, to CoreData Table "Kunder" field "navn", "adresse", "alder" from textfield _name.text, _adress.text, _age.text.
- (IBAction)saveData:(id)sender {
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context = [appDelegate managedObjectContext];
NSManagedObject *newContact;
newContact = [NSEntityDescription insertNewObjectForEntityForName:#"Kunder" inManagedObjectContext:context];
[newContact setValue: _name.text forKey:#"navn"];
[newContact setValue: _adress.text forKey:#"adresse"];
[newContact setValue: _age.text forKey:#"alder"];
//if textfield empty, then error else save and show label message "Kunde Gemt".
_name.text = #"";
_adress.text = #"";
_age.text = #"";
NSError *error;
[context save:&error];
_status.text = #"Kunde Gemt";
}
//Find-search for user by name.
- (IBAction)findKunde:(id)sender {
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context = [appDelegate managedObjectContext];
NSEntityDescription *entityDesc = [NSEntityDescription entityForName:#"Kunder" inManagedObjectContext:context];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setEntity:entityDesc];
NSPredicate *pred =
[NSPredicate predicateWithFormat:#"(navn = %#)", _name.text];
[request setPredicate:pred];
NSManagedObject *matches = nil;
//if no user then error, else take name match and get "adresse" and "alder" from CoreData and show it in the text fields _adress.text and _age.text and show matche count in status label.
NSError *error;
NSArray *objects = [context executeFetchRequest:request error:&error];
if ([objects count] == 0) {
_status.text = #"Ingen fundet";
} else {
matches = objects[0];
_adress.text = [matches valueForKey:#"adresse"];
_age.text = [matches valueForKey:#"alder"];
_status.text = [NSString stringWithFormat: #"%lu antal fundet", (unsigned long)[objects count]];
}
}
#end
My ViewController.h page (no error)
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
#interface ViewController : UIViewController
#property (strong, nonatomic) IBOutlet UITextField *name;
#property (strong, nonatomic) IBOutlet UITextField *adress;
#property (strong, nonatomic) IBOutlet UITextField *age;
#property (strong, nonatomic) IBOutlet UILabel *status;
- (IBAction)saveData:(id)sender;
- (IBAction)findKunde:(id)sender;
#end
My AppDelegate.m file
#import "AppDelegate.h"
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
return YES;
}
....
#end
UPDATE
When adding text to the fields and hit save, i don get a "Save ok" message it jump to xcode and show me this.

Answer 1

Is seems that you forgot to import <CoreData/CoreData.h>.
You can add the import to your precompiled header (...-Prefix.pch) file
which would look similar to this:
#import <Availability.h>
#ifndef __IPHONE_5_0
#warning "This project uses features only available in iOS SDK 5.0 and later."
#endif
#ifdef __OBJC__
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h> // <-- Add this !!
#endif
You might also have to add the "CoreData.framework" to the "Link Binary With Libraries"
section of the targets "Build Phases".