獲取當前時間的時分秒

    // 實例化日曆對象
    NSCalendar *calendar = [NSCalendar currentCalendar];
   
    // 獲取當前時間的秒數
    NSDateComponents *comps = [calendar components:NSCalendarUnitSecond fromDate:[NSDate date]];
    // 獲取當前時間的分鐘數
    NSDateComponents *minute = [calendar components:NSCalendarUnitMinute fromDate:[NSDate date]];
    // 獲取當前時間的分鐘數
    NSDateComponents *hour = [calendar components:NSCalendarUnitHour fromDate:[NSDate date]];
   // NSLog(@"%.2f", 10/0.3);
   
    // 設置秒針的旋轉
    CGFloat angle = degree2angle(comps.second * 360 / 60);
    self.secondView.transform = CGAffineTransformMakeRotation(angle);
    // 設置分針的旋轉
    CGFloat angleM = degree2angle(minute.minute * 360 / 60);
    self.minuteView.transform = CGAffineTransformMakeRotation(angleM);
    // 設置時針的旋轉
    CGFloat angleH = degree2angle(hour.hour*30 + minute.minute/10.0 *5);
    self.hourView.transform = CGAffineTransformMakeRotation(angleH);
   // (hour*30) + (minutes/10)*6