How can I recall or reestablish a timer that was previously invalidated?
I am trying to allow the user to revalidate/restart a timer when they click a button. Is this possible?
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You'll need to re-initialise it. – max_ Aug 08 '14 at 16:24
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you *can* change the fire date, but if it has already invalidated then you need to make a new one. – Brad Allred Aug 08 '14 at 17:53
2 Answers
10
Unfortunately, no.
Once invalidated, timer objects cannot be reused.
Just make a new one.
Hyperbole
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When you invalidate a timer, set it to nil. Then you'll be able to point it to a new NSTimer object.
Example:
//When you're done using your timer
[timer invalidate];
timer = nil;
//When you want to use it again
timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(tick) userInfo:nil repeats:TRUE];
rebello95
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Setting a variable to `nil` then assigning a new pointer to it is not the same is reinitializing the previous object. – Hyperbole Aug 08 '14 at 19:46