Getting autocomplete to work in swift

Question

I am trying to implement autocompletion, but can\'t find an example that works in Swift. Below, I\'m tring to convert Ray Wenderlich\'s autocompletion tutorial and example c

Answer 1

Got it working with the below. The upper/lower case threw it off initially. I'm using it to autocomplete country names...

import UIKit

class billingAddressViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UITextFieldDelegate {


    @IBOutlet var countryTextField: UITextField!
    @IBOutlet var countryTableView: UITableView!

    var autocompleteCountries = [String]()

    // Get list of countries
    let countries = NSLocale.ISOCountryCodes().map { (code:String) -> String in
        let id = NSLocale.localeIdentifierFromComponents([NSLocaleCountryCode: code])
        return NSLocale(localeIdentifier: "en_US").displayNameForKey(NSLocaleIdentifier, value: id) ?? "Country not found for code: \(code)"
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        countryTextField.delegate = self

        countryTableView!.delegate = self
        countryTableView!.dataSource = self
        countryTableView!.scrollEnabled = true
        countryTableView!.hidden = true
    }

    func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {

        print("text field has changed")
        countryTableView!.hidden = false

        let substring = (self.countryTextField.text! as NSString).stringByReplacingCharactersInRange(range, withString: string)
        print(substring)
        searchAutocompleteEntriesWithSubstring(substring)
        return true
    }

    func searchAutocompleteEntriesWithSubstring(substring: String) {
        autocompleteCountries.removeAll(keepCapacity: false)
        print(substring)

        for curString in countries {
            //print(curString)
            let myString: NSString! = curString.lowercaseString as NSString
            let substringRange: NSRange! = myString.rangeOfString(substring.lowercaseString)
            if (substringRange.location == 0) {
                autocompleteCountries.append(curString)
            }
        }

        countryTableView!.reloadData()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return autocompleteCountries.count
    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let autoCompleteRowIdentifier = "AutoCompleteRowIdentifier"
        var cell = tableView.dequeueReusableCellWithIdentifier(autoCompleteRowIdentifier) as UITableViewCell!

        if let tempo1 = cell {
            let index = indexPath.row as Int
            cell!.textLabel!.text = autocompleteCountries[index]
        }

        else {
            cell = UITableViewCell(style: UITableViewCellStyle.Value1, reuseIdentifier: autoCompleteRowIdentifier)
        }

        return cell!
    }

    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        let selectedCell : UITableViewCell = tableView.cellForRowAtIndexPath(indexPath)!
        countryTextField.text = selectedCell.textLabel!.text
        countryTableView.hidden = true
    }

}