Searching through objects in array swift

Question

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

}

}

Hey i have the same problem. I have followed your way, at first, I Got array cannot be bridged and then I have added let array: NSArray. At the end i get EXC_BAD_INSTRUCTION at the filteredTableData. please help me. — Dave Cruise
– Dave Cruise, Commented Nov 18, 2016 at 8:53

pteofil · Accepted Answer · 2015-04-29 11:26:18Z

7

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)

answered Apr 29, 2015 at 11:26

pteofil

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4 Comments

Peter Pik Over a year ago

Hmm do i need somehow to connect the searchBar with the updateSearchResultsForSearchController function

pteofil Over a year ago

Here's a tutorial to help you set properly the SearchController, so that the updateSearchResultsForSearchController gets called: ioscreator.com/tutorials/…

Peter Pik Over a year ago

Okay i missed the searchUpdate. error now: warning: object 0x7ff3aafc0e00 of class 'Striky.Team' does not implement methodSignatureForSelector: -- trouble ahead Unrecognized selector -[Striky.Team valueForKey:]

emreoktem Over a year ago

If you want to avoid the error "does not implement methodSignatureForSelector" you need to inherit your class from NSObject

Duncan C · Accepted Answer · 2015-04-29 11:25:47Z

2

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.

answered Apr 29, 2015 at 11:25

Duncan C

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Comments

TZHX · Accepted Answer · 2015-04-29 13:35:59Z

2

let searchPredicate = NSPredicate(format: "name contains[c] %@", searchWord)
self.filteredArray = self.array.filteredArrayUsingPredicate(searchPredicate)

edited Apr 29, 2015 at 13:35

TZHX

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answered Apr 29, 2015 at 11:55

Britto Thomas

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