Question

My timer not getting repeated please help

here is the code

timer = [NSTimer timerWithTimeInterval:1 target:self selector:@selector(doAnimation:) userInfo:nil repeats:YES];
[timer fire];

method

-(void)doAnimation:(id)Sender
{
}

Answer 1

[timer fire] manually fires the timer only once and is not actually “starting” the timer. From the docs:

You can use this method to fire a repeating timer without interrupting its regular firing schedule. If the timer is non-repeating, it is automatically invalidated after firing, even if its scheduled fire date has not arrived.

You need to add the timer in a run loop before it will start firing and repeating:

You must add the new timer to a run loop, using addTimer:forMode:. Then, after seconds seconds have elapsed, the timer fires, sending the message aSelector to target. (If the timer is configured to repeat, there is no need to subsequently re-add the timer to the run loop.)

An easier way would be to do something like:

timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(doAnimation:) userInfo:nil repeats:YES];

and:

-(void)doAnimation:(NSTimer*)timer
{
}

This automatically schedules the timer and adds it to the run loop. Just in case you aren’t doing it, as you have set the target to be self you have to make sure the method doAnimation is defined within the same class.

NSTimer Class Reference