title: collectionView:cellForItemAtIndexPath: never gets called
body: <p>I have a UICollectionView and I simply want it to show up. I have the delegate and datasource attached to the file's owner in the interface builder.</p>
  
  <pre><code>collectionView:numberOfItemsInSection:
  </code></pre>
  
  <p>Gets called just fine. </p>
  
  <p>I have been messing with this for a few hours and just can't figure it out...</p>
  
  <p>Any help would be great, Thanks in advance!</p>
  
  <p>Here is the full source. Sorry if its kinda messy.</p>
  
  <p>.h File</p>
  
  <pre><code>#import &lt;UIKit/UIKit.h&gt;
  #import &lt;MapKit/MapKit.h&gt;
  #import "PinAnnotation.h"
  
  #import "Jot.h"
  
  @interface JotCardViewController : UIViewController &lt;MKMapViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout&gt;
  
  @property (nonatomic,strong) Jot* jot;
  
  @end
  </code></pre>
  
  <p>.m file</p>
  
  <pre><code>#import "JotCardViewController.h"
  
  #import "JotViewController.h"
  
  #import &lt;QuartzCore/QuartzCore.h&gt;
  
  @interface JotCardViewController ()
  
  @property (nonatomic,strong) JotViewController *detailViewController;
  @property (nonatomic,strong) IBOutlet UIView *cardFrontView;
  @property (nonatomic,assign,getter = isFlipped) BOOL flipped;
  @property (nonatomic,weak) IBOutlet MKMapView *mapView;
  @property (nonatomic,strong) IBOutlet UICollectionView *collectionView;
  
  @property (nonatomic,weak) IBOutlet UILabel *jotTitle;
  @property (nonatomic,weak) IBOutlet UILabel *jotDate;
  @property (nonatomic,weak) IBOutlet UILabel *sunriseSunsetDelta;
  @property (nonatomic,weak) IBOutlet UILabel *jotNotes;
  
  @end
  
  @implementation JotCardViewController
  
  - (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 from its nib.
      [[self mapView] setRegion:MKCoordinateRegionMakeWithDistance(CLLocationCoordinate2DMake([self.jot.latitude floatValue], [self.jot.longitude floatValue]), 1000, 1000)];
      //TODO: if there is no jot location - say that their isn't (maybe text over the map display)
      CLLocation *tempLocation = [[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake([self.jot.latitude doubleValue], [self.jot.longitude doubleValue]) altitude:0 horizontalAccuracy:0 verticalAccuracy:0 timestamp:nil];
      [self dropPin:tempLocation];
  
  
      [self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"Cell"];
  
  
      [self.collectionView reloadData];
  }
  
  - (void) viewWillAppear:(BOOL)animated
  {
      [self refreshUIFromJot];
  }
  
  - (void)didReceiveMemoryWarning
  {
      [super didReceiveMemoryWarning];
      // Dispose of any resources that can be recreated.
  }
  
  - (IBAction)flipToDetails:(id)sender
  {
      if (![self isFlipped]) {
          if (!self.detailViewController) {
              JotViewController *jotViewController = [[JotViewController alloc] initWithNibName:@"JotView" bundle:[NSBundle mainBundle]];
              jotViewController.jot = self.jot;
              self.detailViewController = jotViewController;
              self.detailViewController.view.frame = self.cardFrontView.frame;
              self.detailViewController.view.layer.cornerRadius = 10.0;
          }
  
          [UIView transitionFromView:self.cardFrontView toView:self.detailViewController.view duration:0.33 options:UIViewAnimationOptionCurveLinear |UIViewAnimationOptionTransitionFlipFromRight completion:^(BOOL finished) {
              [self setFlipped:YES];
          }];
      } else {
          [UIView transitionFromView:self.detailViewController.view toView:self.cardFrontView duration:0.33 options:UIViewAnimationOptionCurveLinear |UIViewAnimationOptionTransitionFlipFromLeft completion:^(BOOL finished) {
              [self setFlipped:NO];
          }];
      }
  }
  
  - (void) setJot:(Jot *) jot {
      _jot = jot;
      [self refreshUIFromJot];
  }
  
  - (void) refreshUIFromJot
  {
      [[self jotTitle] setText:self.jot.summary];
      [[self jotDate] setText:self.jot.recorddate];
      [[self jotNotes] setText:self.jot.note];
      [[self sunriseSunsetDelta] setText:@""];
  }
  
  -(void) dropPin: (CLLocation*)newLocation{
  
      for (id&lt;MKAnnotation&gt; pin in self.mapView.annotations){
          MKAnnotationView* anView = [self.mapView viewForAnnotation: pin];
          if (anView){
              [self.mapView removeAnnotation:pin];
              NSLog(@"Pin removed");
          }
      }
  
      PinAnnotation *pin = [[PinAnnotation alloc] initWithCoordinates:newLocation.coordinate placeName:nil description:nil];
      [self.mapView addAnnotation:pin];
  
  
  }
  
  #pragma  mark - MKMapViewDelegate methods
  
  - (void) mapViewDidFinishLoadingMap:(MKMapView *)mapView
  {
      NSLog(@"Map!");
  }
  
  #pragma mark - UICollectionView DataSource
  
  - (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section
  {
      return 1;
  }
  
  - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
  {
      UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
      //cell.backgroundColor = [UIColor colorWithPatternImage:[self.results objectAtIndex:indexPath.row]];
      return cell;
  
      //###
      /*
      NSSet *jotImages = self.jot.images;
      NSSortDescriptor *imageNameDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"imageName" ascending:YES];
      NSArray *sortedJotImages = [jotImages sortedArrayUsingDescriptors:@[imageNameDescriptor]];
      */
      //###
  }
  
  
  #pragma mark - UICollectionViewDelegate
  - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
  {
      // TODO: Select Item
  }
  - (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath {
      // TODO: Deselect item
  }
  
  #pragma mark – UICollectionViewDelegateFlowLayout
  
  - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
  {
      CGSize retval = CGSizeMake(100, 100);
      return retval;
  }
  
  - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
  {
      return UIEdgeInsetsMake(50, 20, 50, 20);
  }
  
  @end
  </code></pre>