Sorting Firebase Realtime Database data in Swift - ios

Question

I need to show these data in a table view, but they have been on the table view in mixing order. How can I put them in the same order as in the database. Please help, I will deeply appreciated.
First image shows my iPhone screen after running the project, second one is the database. I want them exact order as in the database.

Answer 1

I hope periods objects look like this:
struct PeriodItem {
let key: String
let periodEnd: String
let periodName: String
let periodStart: String
let ref: FIRDatabaseReference?
init(periodEnd: String, periodName: String, periodStart: String, key: String = "") {
self.key = key
self.periodEnd = periodEnd
self.periodName = periodName
self.periodStart = periodStart
self.ref = nil
}
init(snapshot: FIRDataSnapshot) {
key = snapshot.key
let snapshotValue = snapshot.value as! [String: AnyObject]
periodEnd = snapshotValue["periodEnd"] as! String
periodName = snapshotValue["periodName"] as! String
periodStart = snapshotValue["periodStart"] as! String
ref = snapshot.ref
}
func toAnyObject() -> Any {
return [
"periodEnd": periodEnd,
"periodName": periodName,
"periodStart": periodStart,
"key": key
]
}
}
So
When you fill your array of Periods fully, just use sorting:
// periods - array of objects from firebase database
let yourTableViewPeriodsArray = periods.sorted(by: { $0.key < $1.key }) // maybe ">" instead of "<"
Then:
DispatchQueue.main.async {
self.tableView.reloadData()
}
Hope it helps.