使用UIButton添加和減少時間到計時器

Question

大家好我有一個問題，我可以如何添加和減少時間與UIButton定時器例如，如果我將有減號和加號和定時器的時間按鈕。

謝謝。

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

，你可以使用這個添加的時間到的NSTimer：

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

你可以通過減少時間到的NSTimer：

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

希望這有助於！