iphone - 在标签中显示计时器

Question

与大多数游戏一样，我看到计时器的格式为“01:05”

我正在尝试实现一个计时器，重置时我需要将计时器重置为“00:00”。

这个计时器值应该在标签中。

如何创建一个递增的计时器？就像 00:00---00:01---00:02......类似 dat 的东西。

建议

问候

Answer 1

我使用的一个简单方法是:

//In Header
int timeSec = 0;
int timeMin = 0;
NSTimer *timer;

//Call This to Start timer, will tick every second
-(void) StartTimer
{
     timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerTick:) userInfo:nil repeats:YES];
     [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
}

//Event called every time the NSTimer ticks.
- (void)timerTick:(NSTimer *)timer
{
     timeSec++;
     if (timeSec == 60)
     {
        timeSec = 0;
        timeMin++;
     }
     //Format the string 00:00
     NSString* timeNow = [NSString stringWithFormat:@"%02d:%02d", timeMin, timeSec];
     //Display on your label
     //[timeLabel setStringValue:timeNow];
         timeLabel.text= timeNow;
}

//Call this to stop the timer event(could use as a 'Pause' or 'Reset')
- (void) StopTimer
{
    [timer invalidate];
    timeSec = 0; 
    timeMin = 0;
     //Since we reset here, and timerTick won't update your label again, we need to refresh it again.
     //Format the string in 00:00
     NSString* timeNow = [NSString stringWithFormat:@"%02d:%02d", timeMin, timeSec];
     //Display on your label
// [timeLabel setStringValue:timeNow];
       timeLabel.text= timeNow;
}