Как вы можете определить час, минуту и секунду из класса NSDate в Swift 3?
В Swift 2:
let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let components = calendar.components(.Hour, fromDate: date)
let hour = components.hour
Swift 3?
В Swift 3.0 Apple удалил префикс NS и сделал все просто. Ниже приведен способ получения часа, минуты и секунды из класса "Дата" (NSDate alternate).
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)")
Подобно этим вы можете получить эру, год, месяц, дату и т.д., передав соответствующие.
Swift 4.2 & 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)")
let date = Date()
let units: Set<Calendar.Component> = [.hour, .day, .month, .year]
let comps = Calendar.current.dateComponents(units, from: date)
Swift 4
let calendar = Calendar.current
let time=calendar.dateComponents([.hour,.minute,.second], from: Date())
print("\(time.hour!):\(time.minute!):\(time.second!)")
В Swift 3 вы можете сделать это,
let date = Date()
let hour = Calendar.current.component(.hour, from: date)
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)
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
Для лучшего использования я создаю эту функцию:
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)"
}
Вы просто называете это так, как хотите:
print("Date = \(self.dateFormatting())")
это вывод:
Date = Monday 15 October 2018 - 17:26:29
если хотите только время просто поменяйте
dateFormatter.dateFormat = "HH:mm:ss"
и это вывод:
Date = 17:27:30
и что это...
Это может быть удобно для тех, кто хочет использовать текущую дату в нескольких классах.
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
}
}
Использование
var time = ""
time = time.getCurrentTime()
print(time) // 1900-12-09-12-59