IOS FindObjectsInBackgroundWithBlock -> setNeedsDisplay - ios

Question

I'm running a Parse program which grabs the data and creates objects from it using 'findObjectsInBackgroundWithBlock'. Once that is complete I update self and then call '[self.tableView setNeedsDisplay]', but nothing changes on my display and no new items are shown. Am I doing something wrong? and how do I fix it?
-(void)pullDown{
NSLog(#"Began PullDown");
NSMutableArray *bugs = [NSMutableArray arrayWithObjects: nil];
//NSMutableArray *bugs = [NSMutableArray arrayWithObjects: nil];
NSLog(#"Journal POSTS");
PFQuery *queryJournal = [PFQuery queryWithClassName:#"Post"];
[queryJournal whereKey:#"user" equalTo:[PFUser currentUser]];
NSLog(#"WHEN ARE YOU CALLED?");
[queryJournal findObjectsInBackgroundWithBlock:^(NSArray *posts, NSError *error) {
if (!error) {
// The find succeeded.
//NSLog(#"Successfully retrieved %# Posts.", posts);
// Do something with the found objects
for (PFObject *object in posts) {
int rating = object[#"Rating"];
NSLog(#"RATING object: %#; int: %i", object[#"Rating"], rating);
MSJournalerDoc *post = [[MSJournalerDoc alloc] initWithTitle:object[#"Title"] rating:rating thumbImage:object[#"imageFile"] fullImage:object[#"imageFile"]];
[bugs addObject:post];
}
NSLog(#"HELL YA");
NSLog(#"THE LIST: %#", bugs);
self.bugs = bugs;
NSLog(#"END OF LOOOOOOOOOOOOOOOPS %lu", bugs.count);
[self.tableView setNeedsDisplay];
NSLog(#"MOAR");
} else {
// Log details of the failure
NSLog(#"Error: %# %#", error, [error userInfo]);
}
}];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
if ([PFUser currentUser]) {
NSLog(#"CURRENT USER");
[self pullDown];
NSLog(#"POST CURRENT USER");
}
else{
[self createUser];
[self createBug];
}
self.navigationItem.leftBarButtonItem = self.editButtonItem;
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(insertNewObject:)];
self.navigationItem.rightBarButtonItem = addButton;
//Change the Title
self.title = #"Posts";
self.navigationItem.leftBarButtonItem = self.editButtonItem;
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
target:self action:#selector(addTapped:)];
NSLog(#"Finished ViewDidLoad");
}

Answer 1

You have a couple of different issues.
First, calling setNeedsDisplay on a view causes it to be redrawn, but this isn't enough for a table view because none of its data has been updated. Instead, you need to call reloadData which will update the data and trigger a redraw automatically.
Secondly, you are trying to use images returned by parse, but parse never returns images (at least not directly). So, accessing object[#"imageFile"] is returning you a PFFile, not a UIImage. You need to call getDataInBackgroundWithBlock: to get the image data before you can use it.