[Solved] Timer: start-pause-resume-stop not working the way it should in ios [closed]

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Here’s the basic outline of a class to achieve this. The idea is that the timer fires every second and timer is only accumlated (into _timerValue) if the paused flag (_paused) is NO.

TimerClass.h:

@interface TimerClass : NSObject {
    NSTimer *_timer;
    BOOL _paused;
    NSInteger _timerValue;
}

@end

TimerClass.m:

@implementation TimerClass

- (IBAction)startTimer:(id)sender {
    NSAssert(!_timer, @"Already started");
    _timerValue = 0;
    _paused = NO;
    _timer = [NSTimer scheduledTimerWithTimeInterval:1.0f
                                              target:self
                                            selector:@selector(tick:)
                                            userInfo:nil
                                             repeats:YES];
}

- (IBAction)stopTimer:(id)sender {
    [_timer invalidate];
    _timer = nil;
}

- (IBAction)pauseTimer:(id)sender {
    _paused = YES;
}

- (IBAction)resumeTimer:(id)sender {
    _paused = NO;
}

- (void)tick:(NSTimer *)timer {
    if (!_paused)
        _timerValue++;
}

@end

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solved Timer: start-pause-resume-stop not working the way it should in ios [closed]