Question

I would like to change the color of the rows in my tableview to red.. if the date (subtitle) is older than 5 days from today. I tried something like: (example with the textfield color)

    // Configure the cell...

    cell.textLabel?.textColor = UIColor.blueColor()
    cell.detailTextLabel?.textColor = UIColor.darkGrayColor()

    let item = frc.objectAtIndexPath(indexPath) as! Item
    cell.textLabel?.text = item.name! + "-" + item.etage! + "-" + item.raum!
    let note = item.date
    cell.detailTextLabel!.text = "\(note!)"

    if note == "04.04.2016 20:31:55" {
        cell.detailTextLabel?.textColor = UIColor.redColor()
    } else {

    }


    return cell
}

and it works.. but only with the exact time (minutes, seconds). How can i do this with compare only the day minus 5 days?

Answer 1

您可以使用NSDate的扩展名：

extension NSDate {
    func numberOfDaysRoundedUp(toDateTime : NSDate) -> Int {
        let calendar = NSCalendar.currentCalendar()
        let components = calendar.components(NSCalendarUnit.Day, fromDate: self, toDate: toDateTime, options: [])
        return abs(components.day)
    }

    func olderThanFiveDays(toDateTime : NSDate) -> Bool {
        return (numberOfDaysRoundedUp(toDateTime) > 5)
    }
}

用法：

// Today (4 April 2016 - 19:16:14)
let date : NSDate = NSDate()

// 1 April 2016 - 19:16:14
let aprilFirst : NSDate = NSDate(timeIntervalSince1970: NSTimeInterval(1459538184))
// 1 March 2016 - 19:29:00
let marchFirst : NSDate = NSDate(timeIntervalSince1970: NSTimeInterval(1456860540))

print(date.numberOfDaysRoundedUp(aprilFirst)) // 3
print(date.olderThanFiveDays(aprilFirst)) // False

print(date.numberOfDaysRoundedUp(marchFirst)) // 34
print(date.olderThanFiveDays(marchFirst)) // True

这可能是一个粗略的方法，但我认为它易于理解，易于更改并满足您的需求。

Swift tableview row color based from subtitle

1 个答案: