Sort String date in object

Question

I have table view, that have data like "from,To, Action, Date and description". now I'm getting the date as string format and I need to sort the messages by date from latest date to earlier date, I tried sort code but it sort just first two characters. for ex: tSFDATE have strings "11/01/2010", "01/02/2010". the result will be

"01/02/2010", "11/01/2010". so any solution to sort TrackObj by date

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {let cell = tableView.dequeueReusableCell(withIdentifier: "myCell", for: indexPath) as! TrackingTableViewCell

        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "dd/MM/yyyy - hh:mm:ss"


        let sortedArray = self.trackingListArr.sorted { dateFormatter.date(from: $0.tSFDATE!)! < dateFormatter.date(from: $1.tSFDATE!)! }


        let trackObj = sortedArray[indexPath.row]


            cell.lblFromValue.text = trackObj.fROMUSERAR!

            cell.lblToValue.text = trackObj.tOUSERAR!

            cell.lblPurpsValue.text = trackObj.tSFPURPOSEAR!

            cell.lblDateValue.text = trackObj.tSFDATE!

            cell.lblNoteValue.text = trackObj.tSFDESCRIPTION!

    return (cell)

}

here is the result image

use .compare for date comparison instead. something like date1.compare(date2) == .orderedAscending — koropok
– koropok, Commented Jan 10, 2018 at 7:22
@koropok can you give me the code because I tried it but I believe there is something wrong with my code — Ahmad Taalab
– Ahmad Taalab, Commented Jan 10, 2018 at 7:29
Strings representing dates can only be sorted reliably if they are in format yyyy MM dd (first year then month then day). If this is not possible you have to convert the date string to Date. — vadian
– vadian, Commented Jan 10, 2018 at 8:22

NSAdi · Accepted Answer · 2018-01-10 11:08:34Z

7

You are trying to sort the string instead of the date. To properly sort it you first need to convert your tSFDATE string to Date and then sort it.

This should work with your existing array...

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd/MM/yyyy - HH:mm:ss"

let sortedArray = trackingListArr.sorted { (lhs: trackingListArr, rhs: trackingListArr) -> Bool in
    // you can have additional code here
    return dateFormatter.date(from: lhs.tSFDATE)! > dateFormatter.date(from: rhs.tSFDATE)!
}

EDIT : Compact closure declaration

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd/MM/yyyy - HH:mm:ss"

let sortedArray = trackingListArr.sorted { dateFormatter.date(from: $0.tSFDATE)! < dateFormatter.date(from: $1.tSFDATE)! }

EDIT 2 : Changed dateFormat to "dd/MM/yyyy - HH:mm:ss" to handle 24-hour time.

edited Jan 10, 2018 at 11:08

answered Jan 10, 2018 at 8:16

NSAdi

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10 Comments

Ahmad Taalab Over a year ago

what do you mean by example

NSAdi Over a year ago

Whoops. That was the struct I used to test my code. I've fixed it now and updated the answer.

NSAdi Over a year ago

That's strange, do you get an error or does it sort incorrectly?

Ahmad Taalab Over a year ago

I edited my question and attached your code and screenshot

Ahmad Taalab Over a year ago

I changed "<" to and it worked, but in some times it gives me the below error fatal error: unexpectedly found nil while unwrapping an Optional value. can you help me to submit this answer as a correct

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