Search bar at the top of UIPickerView in Swift

Here is a simple solution that I used in my recent project. First of all, you need to focus on the following points.

• Try using UITextfield for better customization
• Use a table view to easily populate data inside the main viewController class.
• Avoid using things that are a little annoying and old-fashioned.
• Try to make your code more realistic and hassle-free.

First things first : - I am using Xcode 7.2.2 with Swift 2.1

Using the built-in filtering method to filter the array shape and reuse.

Using Array of Array type Dictionary (Swift)

Focusing on the above points .. :)

Here is my class file. Go through the code and you will understand ...

import UIKit

class ComposeMessageClass: UIViewController, UITextFieldDelegate, UITableViewDelegate, UITableViewDataSource {
var filtered = [[String : String]]()
let customerNameForSearch: [[String : String]] = [["name": "Tuhin"], ["name": "Superman"], ["name" : "Rahul"], ["name": "Batman"], ["name": "Spiderman"]]
let customerNameToSearchTemp = ["Tuhin", "Superman", "Rahul", "Batman", "Spiderman"]
var searchActive: Bool = false
@IBOutlet weak var autofillTable: UITableView!
@IBOutlet weak var autofillTableView: UIView!

override func viewDidLoad() {
    super.viewDidLoad()
    self.autofillTableView.hidden = true
    self.autofillTable.delegate = self
    self.autofillTable.dataSource = self
    self.autofillTable.backgroundColor = tableViewBackGroundColor
    self.autofillTable.separatorColor = tableViewSeperatorColor
    self.autofillTable.layer.borderColor = tableViewBorderColor
    }
}

override func viewWillAppear(animated: Bool) {
}

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

override func viewDidAppear(animated: Bool) {
}

func textFieldDidBeginEditing(textField: UITextField) {
}

func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
    var updatedTextString : NSString = textField.text! as NSString
    updatedTextString = updatedTextString.stringByReplacingCharactersInRange(range, withString: string)
    self.filtered.removeAll()
    self.customerNameToSearchTemp.filter({ (text) -> Bool in
        let tmp: NSString = text
        let range = tmp.rangeOfString(updatedTextString as String, options: NSStringCompareOptions.CaseInsensitiveSearch)
        if range.location != NSNotFound{
            let dataArr = ["name": tmp as String]
            filtered.append(dataArr)

        }
        return false
      }
    })

    if(filtered.count == 0){

        filtered = [["name" : "No results found"]]
        searchActive = true
    } else {
        searchActive = true;
    }
    self.autofillTable.reloadData()
    return true
}

func textFieldDidEndEditing(textField: UITextField) {

}

func textFieldShouldReturn(textField: UITextField) -> Bool {
   textField.resignFirstResponder()
    return true
}

func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return 1
}

internal func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if(searchActive) {
        return self.filtered.count
    }
    return self.customerNameForSearch.count

}
internal func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell:UITableViewCell = self.autofillTable.dequeueReusableCellWithIdentifier("cell")! as UITableViewCell
    cell.backgroundColor = UIColor.clearColor()
    cell.textLabel!.textColor = tableViewCellTextColorGreen
    cell.textLabel!.textAlignment = .Center
    cell.selectionStyle = .None
    cell.textLabel!.font = UIFont(name: "System", size:17)
    if(searchActive){
        if filtered[indexPath.row]["name"]! == "No results found"{
            cell.textLabel!.text = self.filtered[indexPath.row]["name"]!
            cell.userInteractionEnabled = false
        }else{
            cell.userInteractionEnabled = true
            cell.textLabel?.text = self.filtered[indexPath.row]["name"]!
        }
    } else {
        cell.userInteractionEnabled = true
        cell.textLabel?.text = self.appDelegateObjForThisClass.customerNameForSearch[indexPath.row]["name"]!
    }
    return cell
}
internal func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
    if(self.autofillTable.respondsToSelector(Selector("setSeparatorInset:"))){
        self.autofillTable.separatorInset = UIEdgeInsetsZero
    }

    if(self.autofillTable.respondsToSelector(Selector("setLayoutMargins:"))){
        self.autofillTable.layoutMargins = UIEdgeInsetsZero
    }

    if(cell.respondsToSelector(Selector("setLayoutMargins:"))){
        cell.layoutMargins = UIEdgeInsetsZero
    }
}
func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {
    let cell  = tableView.cellForRowAtIndexPath(indexPath)
    cell?.backgroundColor = UIColor.clearColor()
    cell?.textLabel?.textColor = tableViewCellTextColorGreen
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let cell  = tableView.cellForRowAtIndexPath(indexPath)
    cell?.backgroundColor = UIColor.blackColor()
    cell?.textLabel?.textColor = tableViewCellTextColorWhite
    self.selectedCustomerId.removeAll()
    if(searchActive){
        self.contactNameTxtFld.text = self.filtered[indexPath.row]["name]!
    }else{
        self.contactNameTxtFld.text = self.appDelegateObjForThisClass.customerNameForSearch[indexPath.row]["name"]!
    }
}

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?){
    self.view.endEditing(true)
}
}

      

        
        
        
      

    

Installation example above a storyboard.

Thank.

Hope this helped.

Any modification or suggestion of our questions would be appreciated.