iphone - NSTimer - Multiple instances are created -

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i have app, polls server @ regular intervals. polling performed using timer task. timer needs used on 1 screen, when move other screen, timer invalidated.

i observed timer gets invalidated, not. , when not invalidated, multiple instances keep on getting created.

i have initialized timer follows:

 timer = [nstimer scheduledtimerwithtimeinterval: 2                                          target: self                                        selector: @selector(timertask:)                                        userinfo: nil                                         repeats: yes];

and invalidated follows:

if(timer){      [timer invalidate];     timer = nil;   }

please help, needs done in case.

thanks in advance.

are creating multiple timers? in code snipped posted above, if timer defined when execute:

 timer = [nstimer scheduledtimerwithtimeinterval: 2                                      target: self                                    selector: @selector(timertask:)                                    userinfo: nil                                     repeats: yes];

any further reference timer give newest 1 created, way reference original 1 check argument in selector , see if different timer instance variable defined.


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