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POUITableView loading and reloading
 

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    <p>I have trouble loading a UITableView with multiple sections. In order to fill it I use a function (fetches feed from Twitter). At the moment the view loads, the function returns NULL values for it's fields, but after a few seconds it returns the desired feed.</p> <p>However, before the desired feed is returned, the fields in my tableView are shown to be NULL and then they refresh and are filled properly (No NULL values).</p> <p>My question is, How can I make the tableView cells not load until the feed is properly loaded?</p> <p>I have the same problem with my Facebook feed, however it crashes because it doesn't even return any of the values.</p> <p>in ViewDidLoad I have put</p> <pre><code>[self getTwitterFeed:^() { [self.tableView reloadData]; }]; </code></pre> <p>EDIT here is the code of the method</p> <pre><code>- (void)getTwitterFeed:(void (^)(void))completion { ACAccountStore *account = [[ACAccountStore alloc] init]; ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter]; @try { if ([[[NSUserDefaults standardUserDefaults] objectForKey:@"TwitterLoggedIn"] isEqualToString:@"YES"]) { [account requestAccessToAccountsWithType:accountType options:nil completion:^(BOOL granted, NSError *error) { if (granted == YES) { NSArray *arrayOfAccounts = [account accountsWithAccountType:accountType]; if ([arrayOfAccounts count] &gt; 0) { ACAccount *twitterAccount = [arrayOfAccounts objectAtIndex:[[NSUserDefaults standardUserDefaults] integerForKey:@"TwitterAccountNumber" ]]; NSURL *requestURL = [NSURL URLWithString:@"http://api.twitter.com/1.1/statuses/home_timeline.json"]; NSMutableDictionary *parameters = [[NSMutableDictionary alloc] init]; [parameters setObject:@"35" forKey:@"count"]; [parameters setObject:@"true" forKey:@"include_entities"]; SLRequest *postRequest = [SLRequest requestForServiceType:SLServiceTypeTwitter requestMethod:SLRequestMethodGET URL:requestURL parameters:parameters]; postRequest.account = twitterAccount; [postRequest performRequestWithHandler: ^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) { self.dataSource = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableLeaves error:&amp;error]; if (self.dataSource.count != 0) { dispatch_async(dispatch_get_main_queue(), ^{ NSLog(@"Description %@",_dataSource); for(int i=0;i&lt;[_dataSource count];i++) { NSMutableString *url = [NSMutableString stringWithFormat: @"https://www.twitter.com/%@/status/%@",[[[_dataSource objectAtIndex:i ]objectForKey:@"user"] valueForKey:@"screen_name"],[[_dataSource objectAtIndex:i ]objectForKey:@"id"]]; [tweetURL addObject:url]; NSMutableString *urlApp = [NSMutableString stringWithFormat: @"twitter://user?screen_name=%@?status?id=%@",[[[_dataSource objectAtIndex:i ]objectForKey:@"user"] valueForKey:@"screen_name"],[[_dataSource objectAtIndex:i ]objectForKey:@"id"]]; [tweetAppURL addObject:urlApp]; } CGRect frame = CGRectMake (120, 120, 80, 80); activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame: frame]; activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge; activityIndicator.color = [UIColor whiteColor]; [activityIndicator startAnimating]; activityIndicator.hidesWhenStopped=YES; [self.view addSubview:activityIndicator]; completion(); //[self.tableView reloadData]; }); } }]; } } else { } }]; } else //IF FEED IS NOT TURNED ON { [self.tableView reloadData]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Your TWITTER feed is either turned of or isn't initiated!" message:@"Please enable it in Settings" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; } } @catch (NSException * e) { NSLog(@"Exception: %@", e); } </code></pre> <p>}</p>
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    1. COset total rows is 0 to until the feed will load
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    2. COHow and where should I set that? In the numberOfRowsInSection method?
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    3. COExactly, return 0 if you have no feed data
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      1. USKhanh Nguyen
 

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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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