Populate table with username of other followed users - swift

Question

class FollowingTableTableViewController: UITableViewController {
let usernames = NSMutableArray()
override func viewDidLoad() {
super.viewDidLoad()
getUsernames()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
}
func getUsernames() {
var user1 = PFUser.currentUser()
var findUsernames:PFQuery = PFQuery(className: "FollowRequests")
findUsernames.whereKey("from", equalTo: user1!)
findUsernames.includeKey("to")
findUsernames.findObjectsInBackgroundWithBlock { (objects: [AnyObject]?, error: NSError?) -> Void in
var myObjects = objects as! [PFObject]
//Solve this part. Need to get all of the users from the "to" field in FollowRequests.
//If No error
if (error == nil) {
for myObjects in objects! {
var user2 = PFUser()
user2.objectForKey("to")
self.usernames.addObject(user2.username!)
println(user2.username)
}
self.tableView.reloadData()
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete method implementation.
// Return the number of rows in the section.
return self.usernames.count
}
override func tableView(tableView: UITableView,
cellForRowAtIndexPath indexPath: NSIndexPath)
-> UITableViewCell {
let item: AnyObject = self.usernames[indexPath.row]
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! UITableViewCell
cell.textLabel!.text = (usernames[indexPath.row] as! String)
return cell
}
I keep getting the fatal error:
unexpectedly found nil while unwrapping an Optional value.
What do I need to do?
Hoping to find where I messed up.

Answer 1

There is a lot of ? in your code:
First: are you trying to query using the currentUser(username ) or (objectID)
Second: in the findObjectsInBackgroundWithBlock method
you need to check if there is an error first then convert the array of any object to PFObject
if error == nil{
if let objects = objects as! [PFObject]{
for oneSpecificObject in objects{
var data = oneSpecificObject["to"] as! String
self.usernames.addObject(data)
}
self.tableView.reloadData()
}
}
Third: In the cellForRowAtIndexPath method
why you have that extra line
let item: AnyObject = self.usernames[indexPath.row]
//review carefully your code then if you still have problem let me know.