Hi, All,
In my app I have a timer, created in the awakeFromNib and living until
the app terminates. And I have some problem when I close the
application. Here are my code snippets:
- (void) awakeFromNib {
.......
processingTimer = YES;
timer = [NSTimer scheduledTimerWithTimeInterval:0.5
target:self
selector:@selector(onTimer:)
userInfo:nil
repeats:YES];
...
}
As I believe, everything is OK here...
- (void) dealloc {
processingTimer = NO;
[timer invalidate];
......
}
I'm not sure, if I must invalidate the timer, but think I should do it.
- (void)onTimer:(NSTimer*)timer {
.......
//
if (!processingTimer) return;
//
< some procedure is going here, which updates the data for NSTableView
//
if (!processingTimer) return;
//
// Update results list in the NSTableView
[fileView reloadData];
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
here we had an exception within obc_msg_send()
........
}
Here is the onTimer: procedure, where I had an exception after I
closed the application. I tried to remove timer invalidation from the
dealloc, but nothing helped unless I've inserted a boolean var
processingTimer, which should indicate whether our app still lives or
it is slosing now. First I've added this var check only at the top of
onTimer procedure, yet before the main calculating procedure call.
That didn't helped. Then I've added yet another check right before the
call of [NSTable reloadData]. And this helped. At least I've tried to
run and close my app several times and I didn't see an exception.
Also I tried to change timer interval, believing that my main
procedure runs too slowly, so overlapped onTimer calls occur. But it
makes no sense.
So, what is the _correct_ way to do all that?
Thanks.
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