Asynchronous loading - UITableView and Firebase

Question

I\'m working on a project that loads list data from Firebase and populates a UITableView. While I see the snapshots being called from my firebase instance, they don\'t popul

Answer 1

Figured it out. Rather then trying to query the database in viewDidLoad, in which case the view already came up as a frame, I moved the query to the time the nib was loaded but before the frame became visible. Here's the code, expanded upon:

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    //link the CloudViewController with its View
    NSBundle *appBundle = [NSBundle mainBundle];

    self = [super initWithNibName:@"FoodTruckViewController" bundle:appBundle];
    if (self) {
        self.sampleTableView.delegate = self;
        self.sampleTableView.dataSource = self;
        [self loadDataFromFirebase];
        [self.sampleTableView reloadData];
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.sampleTableView reloadData];
}

-(void)loadDataFromFirebase
{
    handles = [[NSMutableArray alloc] init];
    Firebase* listRef = [[Firebase alloc] initWithUrl:@"https://wheresthatfoodtruck.firebaseIO.com/foodtrucks"];
    [listRef observeEventType:FEventTypeChildAdded withBlock:^(FDataSnapshot *snapshot) {
        NSLog(@"%@", snapshot.value);
        [handles addObject:snapshot.value];
    }];
}


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

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [handles count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }
[cell.textLabel setText:[handles objectAtIndex:indexPath.row]];

    return cell;
}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Navigation logic may go here. Create and push another view controller.
    /*
     <#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil];
     // ...
     // Pass the selected object to the new view controller.
     [self.navigationController pushViewController:detailViewController animated:YES];
     */
}

@end

This version of the code populates the table before it becomes visible, but won't update from changes to the table in real time. I think the next step will be to make a call to the ChildChanged function form firebase in the viewDidLoad method to keep updates of any changes on the firebase side.