ios - 使用 UIButton 向 Timer 添加和减少时间

Question

大家好，我有一个问题，我如何使用 UIButton 添加和减少计时器的时间，例如，如果我有带有减号和加号的按钮以及计时器的时间。

谢谢。

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]];
}