Iphone stopwatch - start, stop and start but doesn't start off with where it left off



I are trying to make to a stopwatch app and facing problems getting it to work properly. When I start the stopwatch and stop and start off again, it doesn't continue from where it left off. It carries on running as if it didn't stop. Need some guidance on getting it work properly. I have been trying since morning, the rest of the functions i have made as similar to the apple's stopwatch, only this is bugging me.. Appreciate any help...


The code looks like this:


ViewController.h


#import <UIKit/UIKit.h>
@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>{
UI

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Iphone stopwatch - start, stop and start but doesn't start off with where it left off
Operating Systems

I are trying to make to a stopwatch app and facing problems getting it to work properly. When I start the stopwatch and stop and start off again, it doesn't continue from where it left off. It carries on running as if it didn't stop. Need some guidance on getting it work properly. I have been trying since morning, the rest of the functions i have made as similar to the apple's stopwatch, only this is bugging me.. Appreciate any help...


The code looks like this:


ViewController.h


#import <UIKit/UIKit.h>
@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>{
UI
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I am creating a stopwatch and the start and stop functionality is not coordinated. When the timer stops, it doesn't start where it left of.

The code looks like this:

self.endDate = [NSDate
dateWithTimeIntervalSinceNow:12.0f*60.0f];

-(void)startPressed:(id)sender{
    if(!_running){
        _running = TRUE;
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        if (_stopTimer == nil) {
            _stopTimer = [NSTimer
scheduledTimerWithTimeInterval:1.0/10.0
                                                         target:self
                                                       
selector:@selector(changeTimer:)
                                                       userInfo:nil
                                                        repeats:YES];
        }
    }else{
        _running = FALSE;
        [sender setTitle:@"Start" forState:UIControlStateNormal];
        [_stopTimer invalidate];
        _stopTimer = nil;
    }

}

- (void)changeTimer:(NSTimer*)timer {
    _timeInterval = [self.endDate timeIntervalSinceNow];
    self.timerControl1.minutesOrSeconds =
((NSInteger)_timeInterval)%60;
    self.timerControl2.minutesOrSeconds =
(NSInteger)(_timeInterval/60.0f);
    self.timerControl3.minutesOrSeconds =
((NSInteger)_timeInterval)%60;
}

I know it is because of timeIntervalSinceNow. But, how to change this? Need some guidance on this.



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