parse.com tableview not loading objects - ios

Question

I am trying to load data within my table view from parse.com but the table view loads but with no data. The class name is #"Exibitor" but nothing is loading.
#interface DMKViewControllerExhibitors ()
#end
#implementation DMKViewControllerExhibitors
- (id)initWithCoder:(NSCoder *)aCoder {
self = [super initWithCoder:aCoder];
if (self) {
// Customize the table
// The className to query on
self.parseClassName = #"Exibitor";
// The key of the PFObject to display in the label of the default cell style
self.textKey = #"objectid";
// Uncomment the following line to specify the key of a PFFile on the PFObject to display in the imageView of the default cell style
// self.imageKey = #"image";
// Whether the built-in pull-to-refresh is enabled
self.pullToRefreshEnabled = YES;
// Whether the built-in pagination is enabled
self.paginationEnabled = YES;
// The number of objects to show per page
self.objectsPerPage = 25;
}
return self;
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[super viewDidAppear:animated];
self.canDisplayBannerAds = YES;
#pragma mark - Parse
- (void)objectsDidLoad:(NSError *)error {
[super objectsDidLoad:error];
// This method is called every time objects are loaded from Parse via the PFQuery
}
- (void)objectsWillLoad {
[super objectsWillLoad];
// This method is called before a PFQuery is fired to get more objects
}
// Override to customize what kind of query to perform on the class. The default is to query for
// all objects ordered by createdAt descending.
- (PFQuery *)queryForTable {
PFQuery *query = [PFQuery queryWithClassName:self.parseClassName];
// If no objects are loaded in memory, we look to the cache first to fill the table
// and then subsequently do a query against the network.
if ([self.objects count] == 0) {
query.cachePolicy = kPFCachePolicyCacheThenNetwork;
}
[query orderByAscending:#"name"];
return query;
}
// Override to customize the look of a cell representing an object. The default is to display
// a UITableViewCellStyleDefault style cell with the label being the first key in the object.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath object:(PFObject *)object {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
// Configure the cell
cell.textLabel.text = [object objectForKey:#"text"];
cell.detailTextLabel.text = [NSString stringWithFormat:#"name: %#", [object objectForKey:#"name"]];
return cell;
}
I am new to parse and can't really see why it's not loading.
I need it to list all names in descending order.
i have now put this ini and its throwing an error
* Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'This query has an outstanding network connection. You have to wait until it's done.'
* First throw call stack:
- (PFQuery *)queryForTable {
PFQuery *query = [PFQuery queryWithClassName:#"Exibitor"];
[query whereKey:#"Trade" equalTo:#"True"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
// The find succeeded.
NSLog(#"Successfully retrieved %lu scores.", (unsigned long)objects.count);
// Do something with the found objects
for (PFObject *object in objects) {
NSLog(#"%#", object.objectId);
}
} else {
// Log details of the failure
NSLog(#"Error: %# %#", error, [error userInfo]);
}
}]; return query;
}

Answer 1

Maybe you just missed pasting this code into the question, but the query needs to be executed. Somewhere we need to do this ...
PFQuery *query = [self queryForTable];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
// have your tableView reloadData (you need an outlet to do this)
} else {
// Log details of the failure
NSLog(#"%#", error);
}
}];

Answer 2

This is a copy of my coding that works, I'm not understanding exactly what your set-up is for your app, but maybe you can take something from my coding and solve your issue, good luck!
- (PFQuery *)queryForTable
{
PFQuery *query = [PFQuery queryWithClassName:self.parseClassName];
query.cachePolicy = kPFCachePolicyCacheThenNetwork;
if (self.canSearch == 0) {
query = [PFQuery queryWithClassName:self.parseClassName];
} else {
query = [PFQuery queryWithClassName:self.parseClassName];
NSString *searchThis = [searchedBar.text lowercaseString];
[query whereKey:#"Position" containsString:searchThis];
}
[query orderByAscending:#"Position"];
// If Pull To Refresh is enabled, query against the network by default.
if (self.pullToRefreshEnabled) {
query.cachePolicy = kPFCachePolicyNetworkOnly;
}
// If no objects are loaded in memory, we look to the cache first to fill the table
// and then subsequently do a query against the network.
if (self.objects.count == 0) {
query.cachePolicy = kPFCachePolicyCacheThenNetwork;
}
return query;
}