tabla - ¿Cómo obtener tiempo(hora, minuto, segundo) en Swift 3 usando NSDate?

restar horas minutos y segundos online

Question

¿Cómo puede determinar la hora, minuto y segundo de la clase NSDate en Swift 3?

En Swift 2:

let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let components = calendar.components(.Hour, fromDate: date)
let hour = components.hour

Swift 3?

Answer 1

En Swift 3.0, Apple eliminó el prefijo ''NS'' e hizo todo simple. A continuación se muestra la forma de obtener hora, minuto y segundo de la clase ''Fecha'' (alternativa NSDate)

let date = Date()
let calendar = Calendar.current

let hour = calendar.component(.hour, from: date)
let minutes = calendar.component(.minute, from: date)
let seconds = calendar.component(.second, from: date)
print("hours = /(hour):/(minutes):/(seconds)")

Como estos, puede obtener la era, el año, el mes, la fecha, etc. pasando el correspondiente.

Answer 2

En Swift 3 puedes hacer esto,

let date = Date()
let hour = Calendar.current.component(.hour, from: date)

Answer 3

Esto puede ser útil para aquellos que desean usar la fecha actual en más de una clase.

extension String {


func  getCurrentTime() -> String {

    let date = Date()
    let calendar = Calendar.current


    let year = calendar.component(.year, from: date)
    let month = calendar.component(.month, from: date)
    let day = calendar.component(.day, from: date)
    let hour = calendar.component(.hour, from: date)
    let minutes = calendar.component(.minute, from: date)
    let seconds = calendar.component(.second, from: date)

    let realTime = "/(year)-/(month)-/(day)-/(hour)-/(minutes)-/(seconds)"

    return realTime
}

}

Uso

        var time = ""
        time = time.getCurrentTime()
        print(time)   // 1900-12-09-12-59

Answer 4

Para mejor útil creo esta función:

func dateFormatting() -> String {
    let date = Date()
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "EEEE dd MMMM yyyy - HH:mm:ss"//"EE" to get short style
    let mydt = dateFormatter.string(from: date).capitalized

    return "/(mydt)"
}

Simplemente llámalo donde quieras así:

print("Date = /(self.dateFormatting())")

esta es la salida:

Date = Monday 15 October 2018 - 17:26:29

si quieres solo el tiempo simplemente cambia:

dateFormatter.dateFormat  = "HH:mm:ss"

y esta es la salida:

Date = 17:27:30

y eso es...

Answer 5

Swift 4

    let calendar = Calendar.current
    let time=calendar.dateComponents([.hour,.minute,.second], from: Date())
    print("/(time.hour!):/(time.minute!):/(time.second!)")

Answer 6

Swift 4.2 y 5

// *** Create date ***
let date = Date()

// *** create calendar object ***
var calendar = Calendar.current

// *** Get components using current Local & Timezone ***
print(calendar.dateComponents([.year, .month, .day, .hour, .minute], from: date))

// *** define calendar components to use as well Timezone to UTC ***
calendar.timeZone = TimeZone(identifier: "UTC")!

// *** Get All components from date ***
let components = calendar.dateComponents([.hour, .year, .minute], from: date)
print("All Components : /(components)")

// *** Get Individual components from date ***
let hour = calendar.component(.hour, from: date)
let minutes = calendar.component(.minute, from: date)
let seconds = calendar.component(.second, from: date)
print("/(hour):/(minutes):/(seconds)")

Swift 3.0

// *** Create date ***
let date = Date()

// *** create calendar object ***
var calendar = NSCalendar.current

// *** Get components using current Local & Timezone ***    
print(calendar.dateComponents([.year, .month, .day, .hour, .minute], from: date as Date))

// *** define calendar components to use as well Timezone to UTC ***
let unitFlags = Set<Calendar.Component>([.hour, .year, .minute])
calendar.timeZone = TimeZone(identifier: "UTC")!

// *** Get All components from date ***
let components = calendar.dateComponents(unitFlags, from: date)
print("All Components : /(components)")

// *** Get Individual components from date ***
let hour = calendar.component(.hour, from: date)
let minutes = calendar.component(.minute, from: date)
let seconds = calendar.component(.second, from: date)
print("/(hour):/(minutes):/(seconds)")

Answer 7

let date = Date()       
let units: Set<Calendar.Component> = [.hour, .day, .month, .year]
let comps = Calendar.current.dateComponents(units, from: date)

Answer 8

let hours = time / 3600
let minutes = (time / 60) % 60
let seconds = time % 60
return String(format: "%0.2d:%0.2d:%0.2d", hours, minutes, seconds)

Answer 9

swift 4

==> Getting iOS device current time:-

print(" ---> ",(Calendar.current.component(.hour, from: Date())),":",
               (Calendar.current.component(.minute, from: Date())),":",
               (Calendar.current.component(.second, from: Date())))

output: ---> 10 : 11: 34