xcode - seleccionar - mostrar fecha y hora actual en html5

Visualización del día de la semana desde el selector de fecha

Question

Quiero almacenar solo el día de la semana como una cadena usando un datePicker en xcode usando swift.

Answer 1

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var datePicker: UIDatePicker!

    @IBAction func displayDay(sender: AnyObject) {
        // grab the selected date from the date picker
        var chosenDate = self.datePicker.date

        // create an NSDateFormatter
        var formatter = NSDateFormatter()
        formatter.dateFormat = "EEEE"

        // grab the day and create a message
        let day = formatter.stringFromDate(chosenDate)
        let result = "That was a /(day)"

        // create alert controller
        let myAlert = UIAlertController(title: result, message: nil, preferredStyle: UIAlertControllerStyle.Alert)

        // add an "OK" button
        myAlert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))

        // show the alert
        self.presentViewController(myAlert, animated: true, completion: nil)
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

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


}

Answer 2

import UIKit
class ViewController: UIViewController {
    @IBOutlet weak var myDatePicker: UIDatePicker!
    @IBOutlet weak var strWeekday: UILabel!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        // set mode to date only
        myDatePicker.datePickerMode = UIDatePickerMode.Date
        // add target for the trigger update function to change the weekday when the user changes the date
        myDatePicker.addTarget(self, action: Selector("triggerUpdate:"), forControlEvents: UIControlEvents.ValueChanged)
        // weekday initial value
        self.strWeekday.text = myDatePicker.date.weekdayName
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    @IBAction func triggerUpdate(sender: AnyObject) {
        self.strWeekday.text = myDatePicker.date.weekdayName
    }
}
extension NSDate {
    // returns weekday name (Sunday-Saturday) as String
    var weekdayName: String {
        let formatter = NSDateFormatter(); formatter.dateFormat = "EEEE"
        return formatter.stringFromDate(self)
    }
}