Swift - Search Bar Initial Load - ios

Question

I am attempting to have a search functionality within my app. The search would basically search for user input in the Parse class in the backend.
So far the code below works very well for my case except that as soon as the view loads (prior to starting typing anything) it loads all the usernames in the backend in the table rows. As the user types letters, it filters. I want to have all the same functionality, except for showing all users in table rows as soon as view loads. How can this be achieved?
class FriendByUsernameTableViewController: UITableViewController, UISearchBarDelegate, UISearchDisplayDelegate {
var friendObject = FriendClass()
#IBOutlet weak var searchBar: UISearchBar!
var searchActive : Bool = false
var data:[PFObject]!
var filtered:[PFObject]!
override func viewDidLoad() {
super.viewDidLoad()
self.searchBar.delegate = self
search()
}
func search(searchText: String? = nil){
let query = PFQuery(className: "_User")
if(searchText != nil){
query.whereKey("appUsername", containsString: searchText)
}
query.findObjectsInBackgroundWithBlock { (results, error) -> Void in
self.data = results as? [PFObject]!
self.tableView.reloadData()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// 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 {
if(self.data != nil){
return self.data.count
}
return 0
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell
let obj = self.data[indexPath.row]
cell.textLabel!.text = obj["appUsername"] as? String
return cell
}
func searchBarTextDidBeginEditing(searchBar: UISearchBar) {
searchActive = true;
}
func searchBarTextDidEndEditing(searchBar: UISearchBar) {
searchActive = false;
}
func searchBarCancelButtonClicked(searchBar: UISearchBar) {
searchActive = false;
}
func searchBarSearchButtonClicked(searchBar: UISearchBar) {
searchActive = false;
}
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
search(searchText)
}
}
The code is based on this tutorial: http://shrikar.com/parse-search-in-ios-8-with-swift/

Answer 1

try adding
if searchText!.stringByTrimmingCharactersInSet(.whitespaceCharacterSet()) != "" {
query.findObjectsInBackgroundWithBlock()
}
in your search function along with the block of course.
This way you won't query if you click on the search bar or if you tap a bunch of spaces.
Also, if you don't want users to be displayed upon load, don't call search() in your viewDidLoad()