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  • How to create your own search bar in Swift (Not using UISearchBar)

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    Here is a small example of custom search bar 
    1. Go to storyboard, take TextField place it at below navigation bar (we will type text here to find any string)
    2. Set delegate of TextField

    Come to ViewController class now

    Create IBOutlet of TextField eg -

    @IBOutlet weak var searchText: UITextField!

    Now declare 2 array globally one for storing all  element and second for storing result of filtered data

    var filteredArray:NSArray = [] //to store filtered data
    var shoppingList:NSArray = [] //to store whole data  

    In “viewDidLoad” define your array

    override func viewDidLoad() { 
            super.viewDidLoad()
            shoppingList = ["Eggs","Fruits","milk","Rice","Vegetables","Milk","oil","apple","pear","banana",
                "raspberry]//you can place dynamic data instead of this 
            // Do any additional setup after loading the view.
        }

     After this we will do some code insideshouldChangeCharactersInRangeto know string type by user

    func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool{
            let string1 = string
            let string2 = searchText.text
            var finalString = ""
            if string.characters.count > 0 { // if it was not delete character
                finalString = string2! + string1
            }
            else if string2?.characters.count > 0{ // if it was a delete character
         
                finalString = String(string2!.characters.dropLast())
             }
            filteredArray(finalString)// pass the search String in this method
            return true
        }
    
        
    func filteredArray(searchString:NSString){// we will use NSPredicate to find the string in array 
            let predicate = NSPredicate(format: "SELF contains[c] %@",searchString) // This will give all element of array which contains search string
            //let predicate = NSPredicate(format: "SELF BEGINSWITH %@",searchString)// This will give all element of array which begins with search string (use one of them)
            filteredArray = shoppingList.filteredArrayUsingPredicate(predicate)
            print(filteredArray)
       }

    By above lines of code we will get our matched result, Now it’s time to display this searched result in controller 

     For this , go to storyboard 

    1. Now take a tableView  and set a prototype cell in it and place it below  the TextFiled(we will show search result here) .

    2. Set Delegate and DataSource of TableView.

     

    3. Place a label inside your prototype cell, and give IBOutlet of this label in your UITableViewCell (ShoppingDataViewCell in this case)

    eg: @IBOutlet weak var searchResultTxt: UILabel!

    Now come to your ViewController class 

    Take  IBOutlet of your tableViewCell , eg:

    @IBOutlet weak var tableView: UITableView!

    Now do some line of code in DataSource method of TableView

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
     let cell:ShoppingDataViewCell = tableView.dequeueReusableCellWithIdentifier("ShoppingDataViewCell", forIndexPath: indexPath)as! ShoppingDataViewCell
            cell.searchResultTxt.text = filteredArray[indexPath.row] as! String
            return cell
    }
    
    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return filteredArray.count;
    }

    And don’t forget to reload you TableView inside this  “filteredArray(searchString:NSString)function

    func filteredArray(searchString:NSString){// we will use NSPredicate to find the string in array 
            let predicate = NSPredicate(format: "SELF contains[c] %@",searchString) // This will give all element of array which contains search string
            //let predicate = NSPredicate(format: "SELF BEGINSWITH %@",searchString)// This will give all element of array which begins with search string
            filteredArray = shoppingList.filteredArrayUsingPredicate(predicate)
            tableView.reloadData()
            print(filteredArray)
    }

    Now run your app and you will see output like below.

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