Modified CSTimeIntervalBase.m frameTick

frame_duration.m

-(void)frameTick
{
    NSTimeInterval interval;
    if (self.paused)
    {
        return;
    }
    
    NSDate *newNow = [NSDate date];
    if (self.startDate) {
        interval = -[self.startDate timeIntervalSinceNow];
    } else if (self.endDate) {
        interval = [self.endDate timeIntervalSinceNow];
    }
    self.startDate = newNow;
    
    if (interval < 0)
    {
        interval = 0;
    }
    
    self.text = [self.formatter stringFromInterval:interval];
    
}