NSTimer ==> setting to nil?

[aryaxt]

I have an nstimer in my vewcontroller, and the property of this timer is set to assign.
Does setting an nstimer to nil also stop the timer if running?

[vick-govin]

No

You need to [timer invalidate]

[Duncan C]

Originally Posted by aryaxt

I have an nstimer in my vewcontroller, and the property of this timer is set to assign.
Does setting an nstimer to nil also stop the timer if running?

No, you need to use [timer invalidate] to stop the timer from running.

You don't have to retain a running timer since the system retains it, so using an assign property is reasonable.

I would suggest writing a custom setter for your property, like this;

- (void) setmyTimer: (NSTimer*) newValue;
{
if (myTimer != nil)
   [myTimer invalidate];
myTimer = newValue;
}

Then, if you assign a new value to the timer, and the property already contains a value, the setter will invalidate it and save the new one in it's place. To stop a running timer, just say

self.myTimer = nil;

If you use the approach above, always use property notation to change the property value (e.g. self.myTimer = newTimer; or [self setTimer: newTimer]