如何暂停NSTimer? [英] How to pause a NSTimer?

问题描述

我有一个使用计时器的游戏.我要这样做，以便用户可以选择一个按钮，它会暂停该计时器，当他们再次单击该按钮时，它将取消暂停该计时器.我已经有了计时器的代码，只是需要暂停计时器和双向按钮的帮助.

I have a game which uses a timer. I want to make it so the user can select a button and it pauses that timer and when they click that button again, it will unpause that timer. I already have code to the timer, just need some help with the pausing the timer and the dual-action button.

计时器代码:

-(void)timerDelay {

    mainInt = 36;

    timer = [NSTimer scheduledTimerWithTimeInterval:1.0
                                         target:self
                                       selector:@selector(countDownDuration)
                                       userInfo:nil
                                        repeats:YES];
}

-(void)countDownDuration {

    MainInt -= 1;

    seconds.text = [NSString stringWithFormat:@"%i", MainInt];
    if (MainInt <= 0) {
        [timer invalidate];
        [self delay];
    }

}

推荐答案

这很容易.

// Declare the following variables
BOOL ispaused;
NSTimer *timer;
int MainInt;

-(void)countUp {
    if (ispaused == NO) {
        MainInt +=1;
        secondField.stringValue = [NSString stringWithFormat:@"%i",MainInt];
    }
}

- (IBAction)start1Clicked:(id)sender {
    MainInt=0;
    timer=[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(countUp) userInfo:Nil repeats:YES];
}

- (IBAction)pause1Clicked:(id)sender {
    ispaused = YES;
}

- (IBAction)resume1Clicked:(id)sender {
    ispaused = NO;
}

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