使用UIButton添加和减少时间到计时器

Question

大家好我有一个问题，我可以如何添加和减少时间与UIButton定时器例如，如果我将有减号和加号和定时器的时间按钮。

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]]; 
} 

Answer 2

，你可以使用这个添加的时间到的NSTimer：

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

你可以通过减少时间到的NSTimer：

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

希望这有助于！