Converting Blog Reader tableview to collectionview not showing up

//
//  TableViewController.m
//  BlogReaderScratch
//
//  Created by MyMac on 9/1/13.
//  Copyright (c) 2013 SneakerDust. All rights reserved.
//

#import "TableViewController.h"
#import "BlogPost.h"
#import "WebViewController.h"

@interface TableViewController ()

@end

@implementation TableViewController

//- (id)initWithStyle:(UICollectionViewStyle)style
//{
//    self = [super initWithStyle:style];
//    if (self) {
//        // Custom initialization
//    }
//    return self;
//}

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSURL *blogURL = [NSURL URLWithString:@"http://blog.teamtreehouse.com/api/get_recent_summary/"];

    NSData *jsonData = [NSData dataWithContentsOfURL:blogURL];

    NSError *error = nil;

    NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
//    NSLog(@"%@",dataDictionary);

    self.blogPosts = [NSMutableArray array];

    NSArray *blogPostsArray = [dataDictionary objectForKey:@"posts"];

    for (NSDictionary *bpDictionary in blogPostsArray) {
        BlogPost *blogPost = [BlogPost blogPostWithTitle:[bpDictionary objectForKey:@"title"]];
        blogPost.author = [bpDictionary objectForKey:@"author"];
        blogPost.thumbnail = [bpDictionary objectForKey:@"thumbnail"];
        blogPost.date = [bpDictionary objectForKey:@"date"];
        blogPost.url = [NSURL URLWithString:[bpDictionary objectForKey:@"url"]];
        [self.blogPosts addObject:blogPost];
    }

}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    // Return the number of sections.
    return 1;
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return [self.blogPosts count];
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];

    BlogPost *blogPost = [self.blogPosts objectAtIndex:indexPath.row];

//    if ( [blogPost.thumbnail isKindOfClass:[NSString class]]) {
//        NSData *imageData = [NSData dataWithContentsOfURL:blogPost.thumbnailURL];
//        UIImage *image = [UIImage imageWithData:imageData];
//        
//        cell.imageView.image = image;
//    } else {
//        cell.imageView.image = [UIImage imageNamed:@"treehouse.png"];
//    }
    cell.textLabel.text = blogPost.title;
    cell.detailTextLabel.text = [NSString stringWithFormat:@"%@ - %@",blogPost.author,[blogPost formattedDate]];
    return cell;
}

- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    NSLog(@"preparing for segue: %@",segue.identifier);

    if ( [segue.identifier isEqualToString:@"showBlogPost"]) {
        NSIndexPath *indexPath = [[self.collectionView indexPathsForSelectedItems] lastObject];
        BlogPost *blogPost = [self.blogPosts objectAtIndex:indexPath.row];
        WebViewController *wbc = (WebViewController *)segue.destinationViewController;
        wbc.blogPostURL = blogPost.url;

        [segue.destinationViewController setBlogPostURL:blogPost.url];
    }
}

@end