Creazione di una data futura a Swift con NSDate()

Question

sto ottenendo un errore: "argomento per il parametro 'coder' in call Missing" per il seguente codice:

var components = NSDateComponents()  
components.setValue(1,forComponent: NSCalendarUnit.CalendarUnitMonth); 
var expirationDate = NSCalendar.currentCalendar().dateByAddingComponents(components,  toDate: NSDate(),options:0) 

La documentazione prevede:

NSCalendar.currentCalendar().dateByAddingComponents(<#comps: NSDateComponents?#>, toDate: <#NSDate?#>, options: <#NSCalendarOptions#>) 

Qualcuno può vedere cosa mi manca? Non vedo un parametro chiamato 'coder' richiesto.

Answer 1

che sembra essere corretto sintatticamente in Swift 1.2:

var components = NSDateComponents() 
components.setValue(1, forComponent: NSCalendarUnit.CalendarUnitMonth); 
let date: NSDate = NSDate() 
var expirationDate = NSCalendar.currentCalendar().dateByAddingComponents(components, toDate: date, options: NSCalendarOptions(0)) 

---

in Swift 2.0 è necessario aggiornare il codice un po 'come questo:

let components: NSDateComponents = NSDateComponents() 
components.setValue(1, forComponent: NSCalendarUnit.Month); 
let date: NSDate = NSDate() 
let expirationDate = NSCalendar.currentCalendar().dateByAddingComponents(components, toDate: date, options: NSCalendarOptions(rawValue: 0)) 

Answer 2

Sintassi per Swift 3

var components = DateComponents() 
components.setValue(1, forComponent: .month) 
let date: Date = Date() 
let expirationDate = Calendar.current.date(byAdding: components, to: date, options: []) 

Answer 3

Ultime Swift 3 sintassi:

var components = DateComponents() 
components.setValue(1, for: .month) 
let date: Date = Date() 
let expirationDate = Calendar.current.date(byAdding: components, to: date)