iphone - NSTimer 计算小时数

Question

我正在使用一个 NSTimer，我正在努力显示分钟和秒。但我对计算小时数所需的数学感到困惑。

我在用：

- (void)updateCounter:(NSTimer *)theTimer {
    static int count = 0;
    count += 1;
    int seconds = count % 60;
    int minutes = (count - seconds) / 60;
    // Not sure how to calculate hours
    int hours = (count - minutes) / 60;
    self.timer.text = [NSString stringWithFormat:@"%.2d:%.2d:%.2d", hours, minutes, seconds];
}

几个小时我应该使用什么计算？

Answer 1

seconds = ...
seconds_in_minute = seconds % 60;
minutes_in_hour = ( seconds / 60 ) % 60;
hour_in_day = ( seconds / 3600 ) % 24;