Databases
StackOverflow2013
Postsdbo
POindex 0 beyond bounds for empty array - Found array but how to fix?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POindex 0 beyond bounds for empty array - Found array but how to fix?
    primarykey
    data
    text
    <p>It appears my code runs fine, but if no Twitter Accounts are stored in the device, the app will crash with this error Terminating app due to uncaught exception 'NSRangeException', reason: '<em>*</em> -[__NSArrayI objectAtIndex:]: index 0 beyond bounds for empty array'</p> <pre><code>- (void)viewDidLoad { ACAccountStore *accountStore = [[ACAccountStore alloc] init]; if (accountStore != nil) { ACAccountType *accountType = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter]; if (accountType != nil) { [accountStore requestAccessToAccountsWithType:accountType options:nil completion:^(BOOL granted, NSError *error) { if (granted) { NSArray *twitterAccounts = [accountStore accountsWithAccountType:accountType]; if (twitterAccounts != nil) { ACAccount *currentAccount = [twitterAccounts objectAtIndex:0]; if (currentAccount != nil) { NSString *friendListString = @"https://api.twitter.com/1.1/friends/list.json?cursor=-1&amp;skip_status=true&amp;include_user_entities=false"; SLRequest *request = [SLRequest requestForServiceType:SLServiceTypeTwitter requestMethod:SLRequestMethodGET URL:[NSURL URLWithString:friendListString] parameters:nil]; if (request != nil) { // 1.1 api requires a user to be logged in. [request setAccount:currentAccount]; [request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) { NSInteger responseCode = [urlResponse statusCode]; if (responseCode == 200) { // ADD STUFFS HERE } [theCollectionView reloadData]; } } }]; } } } } else { NSLog(@"User did not grant access."); } }]; } } [super viewDidLoad]; } </code></pre> <p>I'm not sure why, as I do have the nil check as seen above once it's created? <code>ACAccount *currentAccount = [twitterAccounts objectAtIndex:0];</code> How would I display an <code>UIAlertView</code> or something similar if no accounts are found on device, rather then having it crash?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USiBug
    1. USJason
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COSimply check `if([twitterAccounts count] > 0)` then do your work otherwise array is empty.
      singulars
      1. POindex 0 beyond bounds for empty array - Found array but how to fix?
      1. USTheTiger
    2. COTo checking `if(twitterAccounts!=nil)` doesn't check if there is index available to fetch the object. It just check `twitterAccounts` have been initialized or not. While the error is saying that there is no index 0 available in `twitterAccounts`. So for that `if ([twitterAccounts count] > index){NSLog(@"%@",twitterAccounts[index])}`. Thats it!!
      singulars
      1. POindex 0 beyond bounds for empty array - Found array but how to fix?
      1. USTheTiger
 

Querying!

 
Guidance
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.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload