Swift Parse - local datastore items not appearing in tableView - ios

Question

This is a followup of my question from yesterday yesterdays post
I have successfully saved and object in the local datastore using parse, and and trying to add that object to an array to store them so i can display the contents in a table view. the query is running fine, but it appears to me that nothing is being appended into the array, so nothing shows in the table view. here's my code.
localData.swift file
import Foundation
struct localData {
var date: String!
var latt: NSNumber!
var lattDelta: NSNumber!
var locality: String!
var longi: NSNumber!
var longiDelta: NSNumber!
var name: String!
var note: String!
}
I then declare this globally:
var arrayToPopulateCells = [localData]()
this is my parse query:
func performQuery() {
let query = PFQuery(className: "ParseLighthouse")
query.fromLocalDatastore()
query.whereKey("User", equalTo: PFUser.currentUser()!)
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if error == nil {
// The find succeeded.
println("Successfully retrieved \(objects!.count) lighthouses.")
// Do something with the found objects
if let light = objects as? [PFObject] {
for object in light {
// println(object.objectId)
// println(object.objectForKey("Name"))
// println(object.objectForKey("Locality"))
var singleData = localData()
singleData.name = object["Name"] as! String
singleData.note = object["Note"] as! String
singleData.date = object["Date"] as! String
singleData.latt = object["Latt"] as! NSNumber
singleData.longi = object["Longi"] as! NSNumber
singleData.lattDelta = object["LattDelta"] as! NSNumber
singleData.longiDelta = object["LongiDelta"] as! NSNumber
singleData.locality = object["Locality"] as! String
self.arrayToPopulateCells.append(singleData)
}
}
} else {
// Log details of the failure
println("Error: \(error!) \(error!.userInfo!)")
}
}
}
in my table code:
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return arrayToPopulateCells.count
}
and
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
// var lighthouse = self.lighthouses[indexPath.row]
var data = self.arrayToPopulateCells[indexPath.row]
//setting the prototype cell to link with the identifier set in attributes earlier.
let cell = tableView.dequeueReusableCellWithIdentifier("locationCell") as! lighthouseCell
let row = indexPath.row
cell.cellName.text = data.name
cell.cellPlace.text = data.locality
// cell.cellCoordinates.text = "\(lighthouse.latt)" + ", " + "\(lighthouse.longi)"
// cell.cellNote.text = lighthouse.note
cell.cellDate.text = "\(data.date)"
return cell
}
so im not sure what i'm doing wrong, but it seems that the query is working but nothing is going into the array. any ideas?
i do want to note that the parse object is created on lets say viewcontroller #2, and the query is run on viewcontroller #1 where the table view is. does this make a difference? should i run the query and try to append right after the object is made on the same controller?

Answer 1

I think your problem is you need to call
self.tableView.reloadData()
outside the for object in light { loop
I think your data is being added to the array ok, its just the table view needs to know when its done.
EDIT***
func performQuery() {
let query = PFQuery(className: "ParseLighthouse")
query.fromLocalDatastore()
query.whereKey("User", equalTo: PFUser.currentUser()!)
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if error == nil {
// The find succeeded.
println("Successfully retrieved \(objects!.count) lighthouses.")
// Do something with the found objects
if let light = objects as? [PFObject] {
for object in light {
var singleData = localData()
singleData.name = object["Name"] as! String
singleData.note = object["Note"] as! String
singleData.date = object["Date"] as! String
singleData.latt = object["Latt"] as! NSNumber
singleData.longi = object["Longi"] as! NSNumber
singleData.lattDelta = object["LattDelta"] as! NSNumber
singleData.longiDelta = object["LongiDelta"] as! NSNumber
singleData.locality = object["Locality"] as! String
self.arrayToPopulateCells.append(singleData)
}
self.tableView.reloadData()
}
} else {
// Log details of the failure
println("Error: \(error!) \(error!.userInfo!)")
}
}
}