gistfile1.m

#import "TTActivityTypesViewController.h"
#import "TTConstants.h"
#import "TTActivityType.h"
#import "TTCustomer.h"

static void TTShowAlertWithError(NSError *error)
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
                                                    message:[error localizedDescription]
                                                   delegate:nil
                                          cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}

@interface TTActivityTypesViewController () <NSFetchedResultsControllerDelegate>
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath;
@property (nonatomic, strong) NSFetchedResultsController *fetchedResultsController;
@end

@implementation TTActivityTypesViewController

- (void)awakeFromNib
{
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        self.clearsSelectionOnViewWillAppear = NO;
        self.contentSizeForViewInPopover = CGSizeMake(320.0, 600.0);
    }
    [super awakeFromNib];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor clearColor];
    self.title = @"Activity Types";
    [self loadData];
    NSFetchRequest *fetchRequest = [NSFetchRequest fetchRequestWithEntityName:@"ActivityType"];
    [fetchRequest setReturnsObjectsAsFaults:NO];
    NSSortDescriptor *customerDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"customer.name" ascending:YES];
    NSSortDescriptor *activityTypeDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES];
    fetchRequest.sortDescriptors = @[customerDescriptor, activityTypeDescriptor];
    NSError *error = nil;
    
    // Setup fetched results
    self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest
                                                                        managedObjectContext:[RKManagedObjectStore defaultStore].mainQueueManagedObjectContext
                                                                          sectionNameKeyPath:@"customer"
                                                                                   cacheName:nil];
    [self.fetchedResultsController setDelegate:self];
    BOOL fetchSuccessful = [self.fetchedResultsController performFetch:&error];
    if (! fetchSuccessful) {
        TTShowAlertWithError(error);
    }
    
    [self.refreshControl addTarget:self
                            action:@selector(refreshView:)
                  forControlEvents:UIControlEventValueChanged];
}

-(void)refreshView:(UIRefreshControl *)refresh {
    int64_t delayInSeconds = 2.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        // Reload data
        [self loadData];
        [self.tableView reloadData];
        
        [self.refreshControl endRefreshing];
    });
}

- (void)loadData
{
    // Load the object model via RestKit
    [[RKObjectManager sharedManager] getObjectsAtPath:@"/activity_types" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
        RKLogInfo(@"Load complete: Table should refresh...");
        
        [[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:@"ActivityTypesLastUpdatedAt"];
        [[NSUserDefaults standardUserDefaults] synchronize];
    } failure:^(RKObjectRequestOperation *operation, NSError *error) {
        RKLogError(@"Load failed with error: %@", error);
        
        TTShowAlertWithError(error);
    }];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Table View

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return [[self.fetchedResultsController sections] count];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    id <NSFetchedResultsSectionInfo> sectionInfo = [self.fetchedResultsController sections][section];
    return [sectionInfo numberOfObjects];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    TTCustomer *customer = [[self.fetchedResultsController sections] objectAtIndex:section];
    NSLog(@"customer name: %@", [customer name]);
    return [customer name];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];
    [self configureCell:cell atIndexPath:indexPath];
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {

    }
}

- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
    TTActivityType *activityType = [self.fetchedResultsController objectAtIndexPath:indexPath];
    cell.textLabel.text = [[activityType valueForKey:@"name"] description];
}

#pragma mark NSFetchedResultsControllerDelegate methods

- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
    [self.tableView reloadData];
    // Stop refresh control
    [self.refreshControl endRefreshing];
}

@end