Swift - Search always executing before full text - ios

Question

I have a class that handles the user looking for another user via the username. The looking part is done through SearchBar control. Backend is Firebase.
Here is the full code I have:
class AddFriendByUsernameTableViewController: UITableViewController, UISearchBarDelegate, UISearchDisplayDelegate {
/**************************Global Variables************************/
var friendObject = FriendClass()
var friendsArray = [FriendClass]()
var friendsUsernames = [String]()
var isFirstLoading: Bool = true
var utiltiies = Utilities()
var searchActive : Bool = false
var usernames:[String]!
/**************************UI Components************************/
#IBOutlet weak var searchBar: UISearchBar!
override func viewDidLoad() {
super.viewDidLoad()
self.searchBar.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func search(searchText: String? = nil){
/****************************Get Username by Auth Data****************************/
if(searchText != nil)
{
self.getAllUsersForSearchFilter({(result) -> Void in
if(result.domain == "")
{
let containsResult = self.usernames.contains(searchText!)
if(containsResult == true)
{
/*Query All information for found username*/
let reference = Firebase(url:"https://something.firebaseio.com/users/")
/****************************Get Username by Auth Data****************************/
reference.queryEqualToValue(searchText!).observeEventType(.Value, withBlock: { (snapshot: FDataSnapshot!) -> Void in
for userInstance in snapshot.children.allObjects as! [FDataSnapshot]{
}
})
}else{
print("No matching username to search Text")
}
}
})
}
}
func getAllUsersForSearchFilter(completion: (result: NSError) -> Void)
{
let errorFound:NSError = NSError(domain: "", code: 0, userInfo: nil)
let reference = Firebase(url:"https://something.firebaseio.com/users/")
reference.observeEventType(.Value, withBlock: { (snapshot: FDataSnapshot!) -> Void in
if(snapshot != nil )
{
for userInstance in snapshot.children.allObjects as! [FDataSnapshot]{
//username = (userInstance.value["username"] as? String)!
//self.usernames.append(userInstance.value["username"] as! String)
}
completion(result: errorFound)
}else{
completion(result: errorFound)
}
})
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
if(usernames != nil)
{
return usernames.count
}
return 0
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell
//self.tempObjectHolder = self.data[indexPath.row]
//cell.textLabel!.text = self.tempObjectHolder["appUsername"] as? String
return cell
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let indexPathT = tableView.indexPathForSelectedRow;
let currentCell = tableView.cellForRowAtIndexPath(indexPathT!)
/*Get username selected from the search results. */
self.friendObject.username = currentCell?.textLabel!.text
/*self.friendObject.name = self.tempObjectHolder["name"] as? String
self.friendObject.mobile = self.tempObjectHolder["mobile"] as? String
self.friendObject.telephone = self.tempObjectHolder["telephone"] as? String
self.friendObject.username = self.tempObjectHolder["appUsername"] as? String
self.friendObject.email = self.tempObjectHolder["email"] as? String
self.friendObject.workAddressString = self.tempObjectHolder["workAddress"] as! String
self.friendObject.homeAddressString = self.tempObjectHolder["homeAddress"] as! String*/
self.performSegueWithIdentifier("viewUserResultsSegue", sender: self)
}
func searchBarTextDidBeginEditing(searchBar: UISearchBar) {
searchActive = true;
}
func searchBarTextDidEndEditing(searchBar: UISearchBar) {
searchActive = false;
}
func searchBarCancelButtonClicked(searchBar: UISearchBar) {
searchActive = false;
}
func searchBarSearchButtonClicked(searchBar: UISearchBar) {
search()
searchActive = false;
}
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
search(searchText)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
if (segue.identifier == "viewUserResultsSegue") {
// pass data to next view
//let destinationVC = segue.destinationViewController as! ViewResultUserProfileViewController
//destinationVC.friendObject = self.friendObject;
}
}
}
When I start typing in the the search bar, it executes and triggers an erro:
fatal error: unexpectedly found nil while unwrapping an Optional value
and this is happening because it took the firt character I entered and searched for it. I want it to search for full work (username) not first letters.
Thanks,

Answer 1

To do some action when the keyboard Enter is tapped, you can create an IBAction method in your view controller, such as:
#IBAction func enterDetected(sender: UITextField) {
print("Saw an 'Enter'")
}
Then connect the UITextField's "Primary Action Triggered" connection to the method in Interface Builder.