How to filter multiple fields in a UITableView in swift
I have country codes and country names in a String Array. I just filtered out the country names and display them in the filtered tableView. But when displaying, I was unable to get the corresponding country code from the original table. The country code is not filtered. Please help me. How to filter multiple fields in a 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 conclusion
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Try using tuples.
This is a great feature in the swift version.
After receiving countries
andcountry_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 filter on that 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 method, cellForRowAtIndexPath
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
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I had a similar problem before. The first step is the same, I think. create a tuple where country and code are in the same object together.
var countryAndCode: [(country:String , code: String)] = []
Then I mainly used the OR operator for fields. Your code:
filtered = countries.filter({ (text) -> Bool in
let tmp: NSString = text.attribute
let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
return range.location != NSNotFound
})
In something like this:
filtered = countries.filter({ (text) -> Bool in
let tmp: NSString = text.attribute
let range = tmp.country.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch) || tmp.code.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
return range.location != NSNotFound
})
And in your case, you could do && if you wanted to filter both fields.
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Above answer in Swift 3.0
var countryAndCode: [(country:String , code: String)] = []
for i in 0...coutries.count-1 {
countryAndCode += [(country:countries[i] , code:country_codes[i])]
}
Then filter on that tuple:
filtered = countryAndCode.filter({ (data) -> Bool in
let tmp: NSString = data.country // the name from the variable decleration
let range = tmp.range(of: searchText, options: .caseInsensitive)
return range.location != NSNotFound
})
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