to implement a 1 sec repeating timer in a separate thread
to implement a 1 sec repeating timer in a separate thread
- Subject: to implement a 1 sec repeating timer in a separate thread
- From: Nick Rogers <email@hidden>
- Date: Thu, 22 Oct 2009 13:48:56 +0530
Hi,
I have been trying to implement a 1 second repeating timer, but its
leading to retaining the target object of a thread from which I'm
launching this timer thread.
Here's my implementation.
I'm running this method from my thread.
- (void)setUpTimer
{
timerThread = [[NSThread alloc] initWithTarget:self selector:@selector
(startTimer) object:nil];
[timerThread start];
}
- (void)startTimer
{
timer = [NSTimer timerWithTimeInterval:1.0 target:self
selector:@selector(myTimerFireMethod:) userInfo:nil repeats:YES];
NSRunLoop *theRL = [NSRunLoop currentRunLoop];
[theRL addTimer:timer forMode:NSDefaultRunLoopMode];
while (keepTimerRunning && [theRL runMode:NSDefaultRunLoopMode
beforeDate:[NSDate distantFuture]]);
}
- (void)myTimerFireMethod:(NSTimer*)theTimer
{
[self setUpdateStatus:YES];
}
From my thread I'm doing something when updateStatus is YES and then
I'm setting it to NO, which is again set to YES by this timer, so that
I get to do something at 1 second interval.
But its leading to referencing the target object of my thread, by 3-4
non-objects (bytes), which shows different descriptions every time as
per GC Monitor Instrument (kind of undefined behavior).
Whats wrong with the above scheme, or how can I make it safe?
Googled a lot but couldn't find a simple timer example that would suit
my need. Can you point me to some example code etc.?
Wishes,
Nick
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