ios - Watch OS2 NSTimer problems -

i'm working on app need start timer (using nstimer) when watch activated. timer asks information iphone (about every 1 seconds , maximum 5 seconds). i'm using start timer

timer = [nstimer scheduledtimerwithtimeinterval:2 target:self selector:@selector(myfunction) userinfo:nil repeats:no]; 

in "myfunction" function, restart timer next time.

- (void) myfunction {    //here update label text    // [...]     [timer invalidate];    timer = nil;     counter++;    if(counter<5)    {      timer = [nstimer scheduledtimerwithtimeinterval:2 target:self selector:@selector(myfunction) userinfo:nil repeats:no];    } } 

my problem in simulator works fine in real watch (watch-os2 gm) timer doesn't start or starts 1 time , after seems freeze! see because update label in watch @ every elapsed period shows counter , i'm sure initialized in "will activate" function. don't understand why. same issue?

i having similar , equally frustrating issue main timer has alert timer going off @ regular intervals. works in simulator not watch. hear start sound first alert , nothing. starting timers button rather when watch activates. have same type of code running on published app phone works. cannot find solution. unbelievably frustrating. have had further success resolving issue?