Does repeated use of the same addSubView eat up memory?

Question

Inside viewDidLoad I'm created an array of button objects. When I click on another button in my app, I'm looping through the array, placing the buttons in frames and adding them to the view with the following code:
[self.view addSubview:[buttonsArray objectAtIndex: i]];
[self.view bringSubviewToFront:[buttonsArray objectAtIndex: i]];
When testing on an iPhone, after a while an out of memory error occurs. I am wondering if it is perhaps because of the way I am doing this.
Would repeated occurrences of addSubview and bringSubViewToFriend gradually eat up memory? Or do these overwrite existing items I've previously added to the subview?
Would it be best if I do this just one time inside viewDidLoad and hide the buttons until needed?
Or after clicking on a button, is there something better I should do to release the memory used until needed again?
Does this sound like a likely cause of a memory problem?
Thanks,
doug

Answer 1

I'll check out the subviews property.
In the meantime, programmatically, how would I add the buttons to a single UIView as a container? That sounds very useful.
I did notice that for UIToolbar I could hide and unhide the entire UIToolbar at once with a single property setting of hidden to YES or NO. But I set up the UIToolbar in the Interface Builder.
It would be great to figure out how to add the buttons to a UIView. In fact, what I'd like to do is add them to a scrolling view container at some point.
I just haven't been able to figure out the syntax yet.
Thanks,
doug