How to search inside of Dictionary in Swift - ios

Question

In my UITableView I have cells with avatar image and name surname(UIImage and Label). And I want to search inside of my UITableView. So, when I type my user's name or surname it would show user's name surname with the avatar image.
Now, I can search just inside of an array with the next code:
var rosters = [String: UIImage]()
var displayNames = [String]()
var filteredTableData = [String]()
// Here I remove all elements from the array and add to it user display name and avatar
rosters.removeAll(keepCapacity: false)
for user in OneRoster.buddyList.fetchedObjects! {
var roster = OneRoster.userFromRosterForJID(jid: user.jidStr)
var image = OneChat.sharedInstance.xmppvCardAvatarModule?.photoDataForJID(roster?.jid)
rosters[user.displayName] = UIImage(data: image!)!
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> onlineUserCell {
let cell:onlineUserCell = self.tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! onlineUserCell
if (self.resultSearchController.active) {
cell.username.text = filteredTableData[indexPath.row]
//cell.avatarImage.image = images[indexPath.row]
return cell
}
}
func updateSearchResultsForSearchController(searchController: UISearchController)
{
filteredTableData.removeAll(keepCapacity: false)
displayNames.removeAll(keepCapacity: false)
let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %#", searchController.searchBar.text!)
for (name, image) in rosters {
displayNames.append(name)
let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %#", searchController.searchBar.text!)
let array = (displayNames as NSArray).filteredArrayUsingPredicate(searchPredicate)
filteredTableData = array as! [String]
}
let array = (displayNames as NSArray).filteredArrayUsingPredicate(searchPredicate)
filteredTableData = array as! [String]
self.tableView.reloadData()
}
So, this code searches just among name surname, without avatar image. I thought, that I can use dictionary, as:
var users = [UIImage: String]()
and later search by String and show as UIImage and String together in the cell. But I searched a lot and couldn't found how to search, that later I can search by String and to get result with UIImage, too.
Any ideas?

Answer 1

Searching the dictionary could be done by just accessing the values from the dictionary and searching them like
var users = [UIImage: String]()
let values = Array(users.values)
However this use of dictionary seems a bit wrong as you will never look up a value based on the UIImage I guess.
What you should use instead then would be a tuple or a class that holds both UIImage and String
var users = [(image:UIImage,name:String)]()
you can then simply filter the values like
users.filter { (element:(image:UIImage, name:String)) -> Bool in
return element.name.containsString(searchfrase)
}