Removing views (label) from tab views...

Question

Hello all,
I am again presented with a troubling problem:
Take a 3 tabs app based on the tab Bar Application Template.
I am creating and displaying a label on tab 2 depending on an input from tab1 (a UIActionSheet with index 0 or 1)
if index 0 is selected on tab1 Actionsheet, no label should be displayed on tab 2,
if index 1 is selected on tab1 Actionsheet, a label (called here "appearingLabel") should be displayed on tab 2
In order to avoid memory leaks and confusion, my approach is to destroy the label (if it was created) upon tab2 view's dissappearance :
- (void)viewDidDisappear:(BOOL)animated
if (appearingLabel == nil)
NSLog(@"no label appearinglabel..."); //for debugging purposes
else
[appearingLabel removeFromSuperview];
things start to work OK , but after a couple of switches from tab1/change in Actionsheet choice/tab2 : tab1..., I get en exception that "removeFromSuperview is called on a released object...
According to the code above, how can that be ? Shouldn't
{code
[appearingLabel removeFromSuperview];
{code}
only be called if appearingLabel exists ? (not == nil) ?,?
Any help would be appreciated...!
thanks

Answer 1

Hello Rick,
Thanks again !
I changed the code to :
- (void)viewDidDisappear:(BOOL)animated
if (appearingLabel == nil)
NSLog(@"pas de label appearinglabel...");
else
[appearingLabel removeFromSuperview];
appearingLabel = nil;
works perfectly...
I tried to replicate the
if (cell == nil)
line used in tableviews to create the cell that will be reused if it was not created yet...
I will explore this issue further, but in the mean time, you got it to work !