McDonal_11 McDonal_11 - 21 days ago 5
Swift Question

How to filter multiple fields in UITableView in swift

I am having country codes and country names in String Array. I just filtered country names and displaying in the filtered tableView. But, while displaying, I unable to fetch the respective country code from original tableview. Country code not getting filtered. Kindly help me. How to filter multiple fields in tableView cell.

My Code:

var countries = [String]()
for countryCodes : AnyObject in NSLocale.ISOCountryCodes() {
let dictionary : NSDictionary = NSDictionary(object:countryCodes, forKey:NSLocaleCountryCode)
let identifier : NSString? = NSLocale.localeIdentifierFromComponents(dictionary)
if ((identifier) != nil) {
let country : NSString = NSLocale.currentLocale().displayNameForKey(NSLocaleIdentifier, value: identifier!)!
countries.append(country)
println(countries)
}
}
println(countries)
var country_codes = [String]()
country_codes = NSLocale.ISOCountryCodes() as [String]
println(country_codes) //Working Successfully.

//SEARCH BAR WHILE TYPING TEXT
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {

if(countElements(searchBar.text) >= 3)
{
searchActive = true

filtered = countries.filter({ (text) -> Bool in
let tmp: NSString = text
let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
return range.location != NSNotFound
})
//I filtered only one fields. So, Filtered results are working fine, but, I am having one more fields in tableview cell. That is displaying different datas. I dont know how to filtered multiple fields.
if(filtered.count == 0 || countElements(searchBar.text) == 0)
{
searchActive = false
self.countryTableView.reloadData()
}
else
{
searchActive = true
self.countryTableView.reloadData()
}

}
else
{

searchActive = false
self.countryTableView.reloadData()
}

}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = countryTableView.dequeueReusableCellWithIdentifier("country", forIndexPath: indexPath) as country_tblCell

//println("Cell for ROws \(searchActive)")
if(searchActive)
{
if(filtered.count == 0 || countElements(searchBar.text) == 0)
{
searchActive = false
self.countryTableView.reloadData()
}

else
{
println("First Index \(indexPath.row)")
cell.country_Label.text = filtered[indexPath.row]
cell.countryCodeLabel.text = countryCodes[indexPath.row] //Here need to display filtered datas for Country code.
println("Second Index \(indexPath.row)")
}
}
else
{
println("Normal First Index \(indexPath.row)")
cell.selectionStyle = .None
cell.country_Label.text = countries[indexPath.row]
cell.countryCodeLabel.text = countryCodes[indexPath.row]
cell.layer.borderColor = validateBorderColor.CGColor
cell.layer.borderWidth = 1
println("Normal Second Index \(indexPath.row)")
}

return cell
}


My Output

enter image description here

Answer

Try using tuples.

This is a great feature in swift.

After getting countries and country_codes

Add them to this tuple

var countryAndCode: [(country:String , code: String)] = []
for i in 0...coutries.count {
  countryAndCode.append(country:countries[i] , code:country_codes[i])//this shows error in XCode some times
    //if the above code doesn't compile then use the below code
  countryAndCode += [(country:countries[i] , code:country_codes[i])]
}

Then perform the filtering on this tuple:

filtered = countryAndCode.filter({ (data) -> Bool in
        let tmp: NSString = data.country // the name from the variable decleration
            let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
            return range.location != NSNotFound
        })

Finally in the cellForRowAtIndexPath method use this tuple

cell.country_Label.text = filtered[indexPath.row].country
cell.countryCodeLabel.text = filtered[indexPath.row].code

For more information on tuples you can visit http://www.raywenderlich.com/75289/swift-tutorial-part-3-tuples-protocols-delegates-table-views