Actions into an "if statement" are not executed - iphone

Question

I need to set a text of a label if some particular conditions are true (don't pay attention to them because that part of code is correct). It should be very easy but surprisingly it does not work! That action is completely skipped. I think the problem is caused by that huge amount of "if statements".
This is my code: (the part that is skipped is in the 2nd piece of code)
-(void)setCustomUsername{
stillChecking = YES;
ACAccountStore *account = [[ACAccountStore alloc] init];
ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
[account requestAccessToAccountsWithType:accountType withCompletionHandler:^(BOOL granted, NSError *error)
{
// Did user allow us access?
if (granted == YES)
{
// Populate array with all available Twitter accounts
arrayOfAccounts = [account accountsWithAccountType:accountType];
// Sanity check
if ([arrayOfAccounts count] > 0)
{
NSString *customUser = [self updateCustomUser];
int numberOfAccounts = [arrayOfAccounts count];
int accountsAdded = 0;
specAccountIndex = 0;
NSLog(#"index 0 = %#", [[arrayOfAccounts objectAtIndex:0] username]);
NSLog(#"index 1 = %#", [[arrayOfAccounts objectAtIndex:1] username]);
NSLog(#"spec_username = %#", customUser);
NSLog(#"numberOfAccounts = %i", numberOfAccounts);
// Check if a specified username exist.
if (isThereASpecifiedUsername) {
NSLog(#"3");
while (numberOfAccounts > accountsAdded) {
NSLog(#"4");
if ([customUser isEqualToString:[[arrayOfAccounts objectAtIndex:specAccountIndex] username]]) {
NSLog(#"NewTweet will use the account at index %i", specAccountIndex);
accountsAdded = numberOfAccounts;
stillChecking = NO;
//[accountIndexLabel setText:[NSString stringWithFormat:#"%i", selAccountIndex]];
}
else{
++specAccountIndex;
++accountsAdded;
}
}
NSLog(#"specAccountIndex: %i", specAccountIndex);
}
else {
---------------------------THIS IS THE IMPORTANT PART (BELOW)----------------------------
//we set the value of a simple integer to 0
specAccountIndex = 0;
//now we set the string "finalChoice" equal to specAccountIndex
NSString *finalChoice = [NSString stringWithFormat:#"%i", specAccountIndex];
//now just a check (and yes, it works)
NSLog(#"The app will use the account at index %#", finalChoice);
//than we set the text of a label equal to finalChoice (This part does *NOT* work)
[accountIndexLabel setText:finalChoice];
//than we check if the text has been set (This part does *NOT* work)
NSLog(#"accountIndexLabel check = %#", accountIndexLabel.text);
stillChecking = NO;
}
}}}];
while (stillChecking) {}
NSLog(#"accountIndexLabel check at the end of the process = %#", accountIndexLabel.text);
}

Answer 1

As found out in the comments by Paul, your accountIndexLabel is nil. I suppose this is because you forgot to drag a line from the UILabel to the outlet in the owner's code or forgot to add the outlet before your UILabel field OR if you initialize your UILabel in code that you forgot to alloc init it.
Setting a NSString onto a nil object won't raise an exception in Objective-C as it would do in other languages, in fact it's calling a setter on a nil object which is calling a method on a nil object which just does nothing in Objective-C.
Vote up Pauls comment :-)