I'm trying to create a search function using the UISearchController. However i cant seem to make it work with my Team Object. I've started by creating a Team Object which contain a id, name and shortname. Then i'm retrieving the teamData from a url and adding the Team Objects into an array which is populated into a tableView. This tableView contain a searchController which is suppose to filter the Data, but nothing happens.
arrays
var teamArray = Array<Team>()
var filteredTableData = [String]()
GetTeams function
func getTeams(url: String) {
isApiCalling = true
request(.GET, url, parameters: nil)
.response { (request, response, data, error) in
if error == nil {
let data: AnyObject = data!
let jsonArray = JSON(data: data as! NSData)
for (key: String, subJson: JSON) in jsonArray {
// Create an object and parse your JSON one by one to append it to your array
var newTeamObject = Team(id: subJson["id"].intValue, name: subJson["name"].stringValue, shortname: subJson["shortname"].stringValue)
self.teamArray.append(newTeamObject)
}
self.isApiCalling = false
self.tableView.reloadData()
self.refreshControl?.endRefreshing()
}
}
}
CellForRowAtIndexPath
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("teamCell", forIndexPath: indexPath) as! TeamCell
cell.textLabel?.font = UIFont(name: "HelveticaNeue-Light", size: 20)
cell.textLabel?.text = self.teamArray[indexPath.row].name as String
if (self.cellSelected.containsObject(indexPath)) {
cell.accessoryView = cell.accessoryCheck
} else {
cell.accessoryView = cell.accessoryUncheck
}
return cell
}
FilterData
func updateSearchResultsForSearchController(searchController: UISearchController)
{
filteredTableData.removeAll(keepCapacity: false)
let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text)
let array = (teamArray as NSArray).filteredArrayUsingPredicate(searchPredicate)
filteredTableData = array as! [String]
self.tableView.reloadData()
}
Team Objects
class Team{
var id: Int!
var name: NSString!
var shortname: NSString!
init(id: Int, name:NSString, shortname: NSString) {
self.id = id
self.name = name
self.shortname = shortname
}
}
The contains() method checks whether the specified element is present in the array or not.
Swift has built-in way of checking whether all items in an array match a condition: the allSatisfy() method. Give this thing a condition to check, and it will apply that condition on all items until it finds one that fails, at which point it will return false.
To get the first index of an item in an array in Swift, use the array. firstIndex(where:) method. print(i1!)
The objects in the teamArray don't have a SELF property. You can't use SELF to search in all the properties of the object at once. You have to give the name of the property, and if you want to search in more than one you have to add all those properties to the predicate.
I would think it's enough for you to search in the name property like so:
let searchPredicate = NSPredicate(format: "name CONTAINS[c] %@", searchController.searchBar.text)
If you need in more properties you do like this:
let searchPredicate = NSPredicate(format: "name CONTAINS[c] %@ OR shortname CONTAINS[c] %@", searchController.searchBar.text, searchController.searchBar.text)
Can you post the definition of your Team object, and any sub-objects that it contains? (TeamData).
Also indicate where you expect the search text to appear in your team object.
I haven't used NSPRedicate a lot, but my understanding of the CONTAINS comparison is that it checks an individual field to see if it contains a substring. I don't think it will check all fields of the objects you're searching. That seems like what you're expecting.
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