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CoreDataViewController.m
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CoreDataViewController.m
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//
// CoreDataViewController.m
// CoreDataTutorial
//
// Created by Stephen Jue on 1/31/14.
// Copyright (c) 2014 Stephen Jue. All rights reserved.
//
#import "CoreDataViewController.h"
@interface CoreDataViewController ()
@end
@implementation CoreDataViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)saveData:(id)sender {
calpolyAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
// create object context
NSManagedObjectContext *context = [appDelegate managedObjectContext];
NSManagedObject *newContact;
newContact = [NSEntityDescription
insertNewObjectForEntityForName:@"Contacts"
inManagedObjectContext:context];
[newContact setValue: _name.text forKey:@"name"];
[newContact setValue: _address.text forKey:@"address"];
[newContact setValue: _phone.text forKey:@"phone"];
_name.text = @"";
_address.text = @"";
_phone.text = @"";
NSError *error;
[context save:&error];
_status.text = @"Contact saved";
}
- (IBAction)findContact:(id)sender {
calpolyAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
// create object context
NSManagedObjectContext *context = [appDelegate managedObjectContext];
NSEntityDescription *entityDesc = [NSEntityDescription entityForName:@"Contacts" inManagedObjectContext:context];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setEntity:entityDesc];
NSPredicate *pred = [NSPredicate predicateWithFormat:@"(name = %@)", _name.text];
[request setPredicate:pred];
NSManagedObject *matches = nil;
NSError *error;
NSArray *objects = [context executeFetchRequest:request error:&error];
if([objects count] == 0) {
_status.text = @"No matches";
} else {
_address.text = [matches valueForKey:@"address"];
_phone.text = [matches valueForKey:@"phone"];
_status.text = [NSString stringWithFormat:@"%lu matches found", (unsigned long)[objects count]];
}
}
@end