UIPickerView and UIDatePicker demo using Swift

Hi All, hope everyone is exploring/learning Swift. I have created a sample application which uses UIPickerView and UIDatePicker. I thought of sharing with you. Lets see what I did.

I have created a empty project and added a new swift file called "UIPickerViewDemoController" and a xib file "UIPickerViewDemo.xib".

I am going to add two text fields one for picker view and one for date picker.

    @IBOutlet var textField:UITextField

    @IBOutlet var dateTextField:UITextField

Added a Picker View and Date Picker and created outlets for them.

    @IBOutlet var pickerView:UIPickerView

    @IBOutlet var datePicker:UIDatePicker

Have assigned pickers to inputView property of text fields

        textField.inputView = pickerView

        dateTextField.inputView = datePicker

 Corresponding picker will be shown based up on the first responder status. 

Here is how XIB look like :

Here is the complete initialisation code in viewDidLoad method :

    @IBOutlet var pickerView:UIPickerView

    @IBOutlet var textField:UITextField

    

    @IBOutlet var datePicker:UIDatePicker

    @IBOutlet var dateTextField:UITextField

    

    var elements:Array<String>?

    override func viewDidLoad()

    {

        super.viewDidLoad()

        

        self.edgesForExtendedLayout = UIRectEdge.None

        

        self.title = "Picker View"

        

        textField.inputView = pickerView

        

        elements = ["One","Two","Three","Five","Six","Seven","Eight","Nine","Ten"]

        

        dateTextField.inputView = datePicker

    }

Following are the delegate and datasource implementation for picker view :

    func numberOfComponentsInPickerView(pickerView: UIPickerView!) -> Int

    {

        return 1;

    }

    

    func pickerView(pickerView: UIPickerView!, numberOfRowsInComponent component: Int) -> Int

    {

        return elements!.count;

    }

    

    func pickerView(pickerView: UIPickerView!, titleForRow row: Int, forComponent component: Int) -> String

    {

        return elements![row]

    }

    

    func pickerView(pickerView: UIPickerView!, didSelectRow row: Int, inComponent component: Int)

    {

        textField.text = elements![row]

    }

Following is the valueChanged selector for date picker :

@IBAction func dateValueChanged(sender:UIDatePicker)

    {

        dateTextField.text = sender.date.description

    }

Here is the output :

You can download source code here

UITableView Demo using Swift

Hi All,  Apple has introduced new programming language called "Swift" and iOS 8. Hope all of you know about this. I have downloaded XCode 6.0 beta from "developer.apple.com" and started playing with it. I have created a UITableView demo and thought of sharing it with you.

I have created a empty application and created new UIViewController subclass "TableViewController" and corresponding xib file called "TableView".

Added code in AppDelegate.swift to create a new navigation controller with TableViewController as root view controller :

        var tableVC : TableViewController = TableViewController(nibName: "TableView", bundle: NSBundle.mainBundle())

        var navVC : UINavigationController = UINavigationController(rootViewController: tableVC)

        

        self.window!.rootViewController = navVC

now, func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool of AppDelegate class will look like below :

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {

        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)

        

        var tableVC : TableViewController = TableViewController(nibName: "TableView", bundle: NSBundle.mainBundle())

        var navVC : UINavigationController = UINavigationController(rootViewController: tableVC)

        

        self.window!.rootViewController = navVC

        self.window!.backgroundColor = UIColor.whiteColor()

        self.window!.makeKeyAndVisible()

        

        return true

    }

In TableViewController class, I took elements as an optional array and implemented UITableViewDatasource methods :

    import UIKit

class TableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource

{

    var elements : Array<AnyObject>?

    

    init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {

        super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)

    }

    override func viewDidLoad()

    {

        super.viewDidLoad()

        

        self.title = "Table View"

        

        elements = ["One","Two","Three","Five","Six","Seven","Eight","Nine","Ten"]

    }

    

    func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int

    {

        return elements!.count;

    }

    

    func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell!

    {

        var cell = tableView.dequeueReusableCellWithIdentifier("Cell") as UITableViewCell!

        

        if cell == nil

        {

            cell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "Cell")

        }

        

        cell.textLabel.text = elements![indexPath.row] as String

        

        return cell

    }

}

Here is the output :

Here is the Source Code.