Отображение дня недели От выбора даты

Question

Я хочу сохранить только день недели в виде строки, используя datePicker в xcode, используя swift.

Answer 1

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) 
    } 
} 

Answer 2

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. 
    } 


}