iphone - How to Pause/Play NSTimer? -


i need start nstimer 0:0:0 doing , have pause button on click of timer has pause after time if user clicks play has run paused value of time. how can pause , play in nstimer? help? in advance.

try shizzle... worked great me

edit

to honest actual code this:

-(ibaction)clicked:(id)sender {     if ([startstop.titlelabel.text isequaltostring:@"start"])      {         [startstop settitle:@"pause" forstate:uicontrolstatenormal];         [startstop settitlecolor:[uicolor redcolor] forstate:uicontrolstatenormal];          timer = [nstimer scheduledtimerwithtimeinterval:1.0 target:self selector:@selector(countup) userinfo:nil repeats:yes];         timerdown = [nstimer scheduledtimerwithtimeinterval:1.0 target:self selector:@selector(countdown) userinfo:nil repeats:yes];      } else if ([startstop.titlelabel.text isequaltostring:@"pause"])     {         [startstop settitle:@"resume" forstate:uicontrolstatenormal];         [startstop settitlecolor:[uicolor colorwithred:0/255 green:0/255 blue:255/255 alpha:1.0] forstate:uicontrolstatenormal];          pausestart = [[nsdate datewithtimeintervalsincenow:0] retain];         previousfiredate = [[timer firedate] retain];         [timer setfiredate:[nsdate distantfuture]];      } else if ([startstop.titlelabel.text isequaltostring:@"resume"])     {         [startstop settitle:@"pause" forstate:uicontrolstatenormal];         [startstop settitlecolor:[uicolor redcolor] forstate:uicontrolstatenormal];          float pausetime = -1*[pausestart timeintervalsincenow];         [timer setfiredate:[nsdate datewithtimeinterval:pausetime sincedate:previousfiredate]];         [pausestart release];         [previousfiredate release];     } }

i used uibutton , used code when clicked.

remember put this:

nsdate *pausestart, *previousfiredate;

in .h file

edit!

here countup method. forget down method. seconds, minutes, hours ints

- (void)countup {     seconds += 1;      if (seconds == 60)      {         seconds = 0;         minutes++;          if (minutes == 60)          {             minutes = 0;             hours++;         }     }  }

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