TableView Parse Swift data not showing within the app - ios

Question

I just started coding and I search several posts, but I can't find why my data in the app is not showing up.
It's fetching my data, but I don't understand how I can add it to the tableView My first code for the "override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell" is still there, and please explain why it didn't work. Want to understand why it wasn't working.
class MasterTableViewController: PFQueryTableViewController, PFLogInViewControllerDelegate, PFSignUpViewControllerDelegate {
var noteObjects: NSMutableArray! = NSMutableArray()
#IBAction func logoutAction(sender: UIBarButtonItem) {
PFUser.logOut()
viewDidAppear(true)
}
// Initialise the PFQueryTable tableview
override init(style: UITableViewStyle, className: String!) {
super.init(style: style, className: className)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
// Configure the PFQueryTableView
self.parseClassName = "Note"
self.textKey = "title"
self.pullToRefreshEnabled = true
self.paginationEnabled = false
}
// Define the query that will provide the data for the table view
override func queryForTable() -> PFQuery {
var query = PFQuery(className: "Note")
query.orderByAscending("updatedAt")
return query
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if (PFUser.currentUser() == nil) {
var logInViewController = PFLogInViewController()
logInViewController.delegate = self
var signUpViewController = PFSignUpViewController()
signUpViewController.delegate = self
logInViewController.signUpController = signUpViewController
self.presentViewController(logInViewController, animated: true, completion: nil)
}else {
//self.fetchAllObjectsFromLocalDatastore()
//self.fetchAllObjects()
}
}
func fetchAllObjectsFromLocalDatastore() {
var query: PFQuery = PFQuery(className: "Note")
//query.cachePolicy = .CacheElseNetwork
query.fromLocalDatastore()
query.whereKey("username", equalTo: PFUser.currentUser()!.username!)
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if (error == nil) {
if let objects = objects as? [PFObject] {
for object in objects {
println(object.objectId)
}
}
var temp: PFObject = PFObject()
self.noteObjects = temp.mutableCopy() as! NSMutableArray
self.tableView.reloadData()
}else {
println(error!.userInfo)
}
}
}
func fetchAllObjects() {
PFObject.unpinAllObjectsInBackgroundWithBlock(nil)
var query: PFQuery = PFQuery(className: "Note")
//query.cachePolicy = .CacheElseNetwork
query.whereKey("username", equalTo: PFUser.currentUser()!.username!)
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if (error == nil) {
PFObject.pinAllInBackground(objects, block: nil)
self.fetchAllObjectsFromLocalDatastore()
}else {
println(error!.userInfo)
}
}
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Potentially incomplete method implementation.
// Return the number of sections.
return 0
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete method implementation.
// Return the number of rows in the section.
return self.noteObjects.count
}
//override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath, object: PFObject?) -> PFTableViewCell {
var cell = tableView.dequeueReusableCellWithIdentifier("cell") as! MasterTableViewCell!
if cell == nil {
cell = MasterTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "cell")
}
// Extract values from the PFObject to display in the table cell
if let titleLabel = object?["title"] as? String {
cell?.masterTitleLabel?.text = titleLabel
}
if let textView = object?["text"] as? String {
cell?.masterTextLabel?.text = textView
}
return cell
}
//First try did find the code above afterwards
/*override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! MasterTableViewCell
// Configure the cell...
var object: PFObject = self.noteObjects.objectAtIndex(indexPath.row) as! PFObject
cell.masterTitleLabel?.text = object["title"] as? String
cell.masterTextLabel?.text = object["text"] as? String
return cell
}*/
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.performSegueWithIdentifier("editNote", sender: self)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
var upcoming: AddNoteTableViewController = segue.destinationViewController as! AddNoteTableViewController
if (segue.identifier == "editNote") {
let indexPath = self.tableView.indexPathForSelectedRow()!
var object: PFObject = self.noteObjects.objectAtIndex(indexPath.row)as! PFObject
upcoming.object = object;
self.tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
}
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the specified item to be editable.
return true
}
// Override to support editing the table view.
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
// Delete the row from the data source
let objectToDelete = noteObjects?[indexPath.row] as! PFObject
objectToDelete.deleteInBackgroundWithBlock {
(success: Bool, error: NSError?) -> Void in
if (success) {
// Force a reload of the table - fetching fresh data from Parse platform
self.fetchAllObjects()
} else {
// There was a problem, check error.description
}
}
} else if editingStyle == .Insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
//Signup and Login ViewController created by Parse
func logInViewController(logInController: PFLogInViewController, shouldBeginLogInWithUsername username: String, password: String) -> Bool {
logInController.fields = (PFLogInFields.UsernameAndPassword
| PFLogInFields.LogInButton
| PFLogInFields.SignUpButton
| PFLogInFields.PasswordForgotten)
if (!username.isEmpty || !password.isEmpty) {
return true
}else {
return false
}
}
func logInViewController(logInController: PFLogInViewController, didLogInUser user: PFUser) {
self.dismissViewControllerAnimated(true, completion: nil)
}
func logInViewController(logInController: PFLogInViewController, didFailToLogInWithError error: NSError?) {
println("Failed to log in...")
}
func signUpViewController(signUpController: PFSignUpViewController, shouldBeginSignUp info: [NSObject : AnyObject]) -> Bool {
if let password = info["password"] as? String {
return count(password.utf16) >= 8
} else {
return false
}
}
func signUpViewController(signUpController: PFSignUpViewController, didSignUpUser user: PFUser) {
self.dismissViewControllerAnimated(true, completion: nil)
}
func signUpViewController(signUpController: PFSignUpViewController, didFailToSignUpWithError error: NSError?) {
println("Failed to sign up...")
}
func signUpViewControllerDidCancelSignUp(signUpController: PFSignUpViewController) {
println("User dissmissed sign up.")
}
}
update: changing the numberOfSections didn't help
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
Solved
It's working now, changed this part of the code
func fetchAllObjectsFromLocalDatastore() {
var query: PFQuery = PFQuery(className: "Note")
//query.cachePolicy = .CacheElseNetwork
query.fromLocalDatastore()
query.whereKey("username", equalTo: PFUser.currentUser()!.username!)
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if (error == nil) {
if let objects = objects as? [PFObject] {
for object in objects {
println(object.objectId)
}
}
//var temp: PFObject = PFObject()
//self.noteObjects = temp.mutableCopy() as! NSMutableArray
//println(self.noteObjects)
self.tableView.reloadData()
}else {
println(error!.userInfo)
}
}
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete method implementation.
// Return the number of rows in the section.
return objects!.count
}

Answer 1

#DenisE I had the same trouble and your solution of adding self.tableView.reloadData() fixed it. The reason we have to do this is I believe because view is already appeared and data was queried after that, so unless we reload that queried data in view it won't reflect in UI.

Answer 2

You need to set your number of sections to 1 otherwise there is no section to show and so no content either.
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}