Swift Parse - local datastore and displaying objects in a tableview - ios

Question

I am building and app that saves an object in the local datastore with parse. I then run a query to retrieve the objects that are in the local datastore and it is working fine. however, I would like to grab the object, and the contents in it, and set some labels in a table view cell based on the items that are stored in the parse local data store object. for example, i make an object with attributes like "objectID", "name", "date", "location". what i'd like to do is to have a table view on the home screen that displays the name, date, location ...etc. of each item that was saved in local datastore in labels in each cell.
i know that im saving it correctly:
// parse location object
let parseLighthouse = PFObject(className: "ParseLighthouse")
parseLighthouse.setObject(PFUser.currentUser()!, forKey: "User")
parseLighthouse["Name"] = self.placeTitle.text
parseLighthouse["Note"] = self.placeNote.text
parseLighthouse["Locality"] = self.placeDisplay.text!
parseLighthouse["Latt"] = self.map.region.center.latitude
parseLighthouse["Longi"] = self.map.region.center.longitude
parseLighthouse["LattDelta"] = 0.5
parseLighthouse["LongiDelta"] = 0.5
parseLighthouse["Date"] = dateInFormat
parseLighthouse.pinInBackground()
parseLighthouse.saveInBackgroundWithBlock { (success: Bool, error: NSError?) -> Void in
println("Object has been saved. ID = \(parseLighthouse.objectId)")
}
and when i run the query, im able to access the attributes by running println(object.objectForKey("Name"))
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"))
}
}
} else {
// Log details of the failure
println("Error: \(error!) \(error!.userInfo!)")
}
}
because when running the query, i get back the object id and name as expected.
Successfully retrieved 2 lighthouses.
Optional("A3OROVAMIj")
Optional(happy)
Optional("bbyqPZDg8W")
Optional(date test)
what I would like to do is grab the name field within the parse object local data store, and that be the name of the label on a cell in a table view controller.
i dont know how to access that info from the object, and set the label correctly.
does anyone know how this is possible?

Answer 1

It's always a good idea to avoid pointer lol ... so why not saving the userid or username with the specific object..
so change this line:
parseLighthouse.setObject(PFUser.currentUser()!, forKey: "User")
TO
parseLighthouse["username"] = PFUser.currentUser().username
Answer
NOW let's create a struct that contains the objectID and the Name outside of your Controller Class.
struct Data
{
var Name:String!
var id:String!
}
then inside of the Controller class, declare the following line of code globally
var ArrayToPopulateCells = [Data]()
Then your query function will look like :
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.
print("Successfully retrieved \(objects!.count) lighthouses.")
// Do something with the found objects
if let light = objects as? [PFObject] {
for object in light {
print(object.objectId)
print(object.objectForKey("Name"))
var singleData = Data()
singleData.id = object.objectId
singleData.Name = object["Name"] as! String
self.ArrayToPopulateCells.append(singleData)
}
}
} else {
// Log details of the failure
print("Error: \(error!) \(error!.userInfo)")
}
}
In the tableView numberOfRowinSection()
return ArrayToPopulateCells.count
In the cellForRowAtIndexPath()
var data = ArrayToPopulateCells[indexPath.row]
cell.textlabel.text = data.objectID
cell.detailLabel.text = data.Name
VOila that should be it