matteom

import Foundation
import UIKit

struct CreditCard {
	let number: String
	let expirationDate: Date
}

class CreditCardView {
	@IBOutlet private weak var numberTextView: UITextView!

matteom

- (void)updateLeads {
	NSFetchRequest *leadsFetchRequest = [NSFetchRequest fetchRequestWithEntityName:[PCLead entityName]];
	leadsFetchRequest.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"surname" ascending:YES]];
	self.leads = [self.managedObjectContext executeFetchRequest:leadsFetchRequest error:NULL];
	[self.tableView reloadData];
}

matteom

// In PCLeadsViewController

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
	if ([segue.identifier isEqualToString:@"DisplayLeadSegue"]) {
		PCLeadViewController *leadViewController = segue.destinationViewController;
		NSIndexPath *selectedRowIndexPath = [self.tableView indexPathForSelectedRow];
		leadViewController.lead = self.leads[selectedRowIndexPath.row];
	} else {
		PCNewLeadViewController *newLeadViewController = segue.destinationViewController;
		newLeadViewController.managedObjectContext = self.managedObjectContext;

matteom

// Header file

@protocol PCNewLeadViewControllerDelegate <NSObject>

- (void)newLeadWasCreated;

@end

@interface PCNewLeadViewController : UIViewController

matteom

@implementation PCLead

@dynamic name;
@dynamic surname;
@dynamic company;

+ (instancetype)insertLeadInManagedObjectContext:(NSManagedObjectContext *)managedObjectContext {
    return [NSEntityDescription insertNewObjectForEntityForName:self.entityName inManagedObjectContext:managedObjectContext];
}

matteom

@interface PCAppDelegate ()

@property PCPersistentStack *persistentStack;

@end

@implementation PCAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
	self.persistentStack = [[PCPersistentStack alloc] initWithStoreURL:[self storeURL] modelURL:[self modelURL]];

matteom

// Header file

@interface PCPersistentStack : NSObject

@property (readonly) NSManagedObjectContext *managedObjectContext;

- (instancetype)initWithStoreURL:(NSURL*)storeURL modelURL:(NSURL*)modelURL;
- (void)saveContext;

@end

matteom

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
	PCLeadViewController *leadViewController = segue.destinationViewController;
	NSIndexPath *selectedRowIndexPath = [self.tableView indexPathForSelectedRow];
	leadViewController.lead = self.leads[selectedRowIndexPath.row];
}

matteom

@interface PCLeadsViewController ()

@property NSArray *leads;

@end

@implementation PCLeadsViewController

- (void)viewDidLoad {
	[super viewDidLoad];

matteom

@interface PCLeadCell ()

@property (weak, nonatomic) IBOutlet UILabel *nameLabel;
@property (weak, nonatomic) IBOutlet UILabel *companyLabel;

@end

@implementation PCLeadCell

- (void)setLead:(PCLead *)lead {