UITableView filtering - ios

Question

I have to perform a search operation in tableview with searchbar.
Which have a label of a person's name and an image for these persons in its cell.
My code is
override func viewDidLoad() {
super.viewDidLoad()
ArrPersons = ["Mahatma Gandhi","Pramukh Swami","Akshay Kumar","Sachin Tendulkar","Chetan Bhagat","Sardar Vallabhai Patel","Amitabh Bachchan"]
arrPersonImages = ["1.png","2.png","3.png","4.png","5.png","6.png","7.png"]
}
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
if (searchText.characters.count>0) {
let predicate = NSPredicate(format: "SELF CONTAINS[c] %#", searchText)
ArrPersons = arrTemp
let array = (self.ArrPersons as NSArray).filteredArrayUsingPredicate(predicate)
print(array)
ArrPersons = array as! [String]
}
else
{
ArrPersons = arrTemp
}
self.tableviewww.reloadData()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return self.ArrPersons.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
let cell = tableviewww.dequeueReusableCellWithIdentifier("mycell")as! buildVcCell
cell.personsImages.image = UIImage (named:arrPersonImages[indexPath.row] )
cell.labelPersonNamess?.text = self.ArrPersons[indexPath.row]
cell.addBtn.addTarget(self, action: #selector(BuildVc.AddbuttonClicked(_:)), forControlEvents: .TouchUpInside)
return cell
}
The problem is this code only perform a search on the array of label persons. arrPersonImages is not filtering according to the name of the person entered it the searchbar.

Answer 1

You should create a "Model" for the Person (using MVC pattern):
First, create "Person" Model:
struct Person {
var name: String?
var imageName: String?
}
instead of using two separated arrays for storing the persons's data, you can create an array of Person Model:
// add those vars to your ViewController:
var persons = [Person]()
var filteredPersons = [Person]()
var isFiltering = false
override func viewDidLoad() {
super.viewDidLoad()
persons = [Person(name: "Ahmad", imageName: "img.png"), Person(name: "Harry", imageName: "img.png")]
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
if (searchText.characters.count>0) {
isFiltering = true
filteredPersons = persons.filter {
$0.name?.range(of: searchText, options: .caseInsensitive, range: nil, locale: nil) != nil
}
print(filteredPersons)
}
else
{
isFiltering = false
filteredPersons = persons
}
self.tableviewww.reloadData()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return isFiltering == true ? filteredPersons.count : persons.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
//...
// getting the current person
let currentPerson = isFiltering == true ? filteredPersons[indexPath.row] : persons[indexPath.row]
// do the rest of the implementation...
//...
}
Note that this is Swift 3 Code.

Answer 2

I think it would make a lot of sense to combine the name and image for each character into a model-struct, and rather use this for the base of the cells. That being said, the following should help you on the way without altering your existing code too much. It will also shy away from actually changing your arrays...
A nice dynamic variable to make things a bit more automatic elsewhere:
var filteredPersons: [String] {
return arrPersons.filter{ $0.contains(searchString) }
}
Which will give you
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return filteredPersons.count
}
Then in you cellForRowAtIndexPath function you can have the name and image created like this:
let name = filteredPersons[indexPath.row]
let imageIndex = arrPersons.index(of: name)
let image = UIImage(named: arrPersonImages[imageIndex])

Answer 3

The best way to do searching is using an array with dictionary properties to keep the search result. Just for your reference:
class PersonController: UITableViewController {
let ArrPersons = [["name": "Mahatma Gandhi", "image": "1.png"], ["name": "Akshay Kumar", "image": "2.png"]]
var searchResult: [[String: String]]!
override func viewDidLoad() {
super.viewDidLoad()
searchResult = ArrPersons
}
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
if (searchText.characters.count>0) {
searchResult = arr.filter { (item) -> Bool in
let name = item["name"]
return name!.containsString(searchText)
}
}
else
{
searchResult = ArrPersons
}
self.tableView.reloadData()
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return self.searchResult.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
let cell = tableView.dequeueReusableCellWithIdentifier("mycell")as! buildVcCell
let person = searchResult[indexPath.row]
cell.personsImages.image = UIImage(named: person["image"]) // Person image
cell.labelPersonNamess?.text = person["name"] // Person name
cell.addBtn.addTarget(self, action: #selector(BuildVc.AddbuttonClicked(_:)), forControlEvents: .TouchUpInside)
return cell
}
}