计时：

计时

//时间
       let timeIndex = model.expireDatetime?.endIndex.advancedBy(-cutLength)
       
       let timeStr = model.expireDatetime?.substringToIndex(timeIndex!)
       
       //转换成日期
       let df = NSDateFormatter()
       df.dateFormat = "yyyy-MM-dd HH:mm:ss"
       
       let expireDate = df.dateFromString(timeStr!)
       
       //日历对象
       let calendar = NSCalendar.currentCalendar()
       /*
        第一个参数:需要计算年月日时分秒里面的哪一项
        第二个参数:开始时间
        第三个参数:结束时间
        第四个参数:选项
        */
       
       let unitFlags = NSCalendarUnit(rawValue: NSCalendarUnit.Hour.rawValue | NSCalendarUnit.Minute.rawValue |
           NSCalendarUnit.Second.rawValue
       )
       
       let dateComponents = calendar.components(unitFlags, fromDate: NSDate(), toDate: expireDate!, options: NSCalendarOptions(rawValue: 0))
       
       self.timeLabel.text = String(format: "剩余%02d:%02d:%02d", dateComponents.hour, dateComponents.minute, dateComponents.second)
       
       //原价
       let priceStr = "￥:\(model.lastPrice!)"
       self.lastPriceLabel.text = priceStr

横线

        if self.lineView == nil {
            
            let lineView = UIView(frame: CGRectMake(0,10,60,1))
            lineView.backgroundColor = UIColor.blackColor()
            self.lineView = lineView
            
            self.lastPriceLabel.addSubview(self.lineView!)

        }