Freshly init array is empty - why?

Question

Newbie here (to C, objective-C, and iOS)...

For this code in my AppDelegate.m, why is the freshly initialized array empty? Looks to me like I give it some values. Clue1 etc are are series of UILabels and there are no issues noted by Xcode. I've been through SO quite a bit and this seems to be the way to do it. Xcode 4.2. Thanks!

- (id)init {       
    self = [super init];
    if(self) {           
        // Make arrays containing the objects: this is the objective-C way!
       self.clueLabs = [[NSMutableArray alloc] initWithObjects: Clue1, Clue2, Clue3, nil];
    }   
    NSLog(@"%@", [clueLabs description]);
    if (!clueLabs || ![clueLabs count]) { // these 2 do m/l the same thing
        NSLog(@"clueLabs is empty!");
    }       
    return self; 
}

Are you using ARC? If not, is clueLabs a retained property? If so, you are over retaining it. — Till
– Till, Commented Jan 29, 2012 at 4:34
Yes, ARC is on. Header file contains "IBOutlet UILabel *Clue1;" and '@property (strong) UILabel *Clue1' for each clue — Bryan Hanson
– Bryan Hanson, Commented Jan 29, 2012 at 4:49

Peter Sarnowski · Accepted Answer · 2012-01-29 04:23:04Z

3

Check if Clue1, Clue2 Clue3 are not nils.

answered Jan 29, 2012 at 4:23

Peter Sarnowski

12k5 gold badges38 silver badges33 bronze badges

Sign up to request clarification or add additional context in comments.

8 Comments

Bryan Hanson Over a year ago

Ah, that might be it. I declare them, but don't give them any values. Thanks, I'll try that. Silly me.

Bryan Hanson Over a year ago

Can I alloc and init the array with nil objects, then set them to some value in a loop, or must I individually init the UILabels to some non nil value? 1st option much shorter code! EDIT: maybe loop approach is not possible b/c count is zero and can't iterate over an empty array to fill it...

Peter Sarnowski Over a year ago

When you init the array with method initWithObjects - they may not be nil. You may create an empty NSMutableArray and fill it with objects later though.

Bryan Hanson Over a year ago

Thanks, I'm back in business!

Bryan Hanson Over a year ago

OK, partially back in business. By init'ing these labels, I'm creating them programatically, but I have already created them via IB. So essentially I have created a totally new set of labels. My creation of the new labels is like this: self.Clue1 = [[UILabel alloc] init]; then [Clue1 setText:@""]; Do I need to add something to make Xcode realize these are the same buttons as in the nib/xib? Thanks.

|

Collectives™ on Stack Overflow

Freshly init array is empty - why?

1 Answer 1

8 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

8 Comments

Your Answer

Sign up or log in

Post as a guest

Related