Add and decrease time with UIButton to Timer

Question

Hello everyone i have a question how i can add and decrease time with UIButton to timer for example if i will have button with minus and plus and time at timer.

Thank you.

Answer 1

-(void)viewDidLoad{
  UIButton *buttonPlus = [UIButton buttonWithType:UIButtonTypeRoundedRect];
  UIButton *buttonMinus = [UIButton buttonWithType:UIButtonTypeRoundedRect];

 [buttonPlus addTarget:self action:@selector(addTime) forControlEvents:UIControlEventTouchUpInside];
 [buttonMinus addTarget:self action:@selector(removeTime) forControlEvents:UIControlEventTouchUpInside];

 [self.view addSubview:buttonMinus];
 [self.view addSubview:buttonPlus];

}

-(void) addTime {
    [yourTimer setFireDate:[[yourTimer fireDate] dateByAddingTimeInterval:secondsToAdd]];
}

-(void) removeTime {
    [yourTimer setFireDate:[[yourTimer fireDate] dateByAddingTimeInterval:-secondsToAdd]];
}

Answer 2

you could add time to a NSTimer using this:

[yourTimer setFireDate:[[yourTimer fireDate] dateByAddingTimeInterval:secondsToAdd]];

You could decrease time to a NSTimer using:

[yourTimer setFireDate:[[yourTimer fireDate] dateByAddingTimeInterval:-secondsToDecrease]];

Hope this helps!