斯威夫特4

let dateFormatter : DateFormatter = DateFormatter()
//  dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
dateFormatter.dateFormat = "yyyy-MMM-dd HH:mm:ss"
let date = Date()
let dateString = dateFormatter.string(from: date)
let interval = date.timeIntervalSince1970

输出

2018 - 5月- 01 10:41:31

Swift 3更新:

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

我是这样做的:

let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let components = calendar.components(.CalendarUnitHour | .CalendarUnitMinute, fromDate: date)
let hour = components.hour
let minutes = components.minute

在objective-c中看到同样的问题，我如何从NSDate中获得小时和分钟?

和Nate的答案相比，你得到的是数字，而不是字符串……

你可以试试这个

func getTime() -> (hour:Int, min:Int, sec:Int) {
        let currentDateTime = NSDate()
        let calendar = NSCalendar.currentCalendar()
        let components = calendar.components([.Hour,.Minute,.Second], fromDate: currentDateTime)
        let hour = components.hour
        let min = components.minute
        let sec = components.second
        return (hour,min,sec)
    }

现在调用该方法并接收带有小时、分钟和秒的日期

    let currentTime = self.getTime()
    print("Hour: \(currentTime.hour) Min: \(currentTime.min) Sec: \(currentTime.sec))")

仅用于特定格式的日期

    let dateFormatter1 = NSDateFormatter()
    dateFormatter1.dateStyle = .MediumStyle
    dateFormatter1.timeStyle = .NoStyle
    dateFormatter1.dateFormat = "dd-MM-yyyy"
    let date = dateFormatter1.stringFromDate(NSDate())

使用Swift 5 (Xcode 10 & Xcode 11)(来自法国UTC)

func getCurrentDateTime() {
    let now = Date()
    let formatter = DateFormatter()
    formatter.locale = Locale(identifier: "fr_FR")
    formatter.dateFormat = "EEEE dd MMMM YYYY HH:mm"
    myLabel.text = formatter.string(from: now)
    myLabel.font = UIFont(name: "HelveticaNeue-Light", size: 12)
    myLabel.textColor = UIColor.black
}

如果您只想显示日期，请设置formatter.dateFormat

formatter.dateFormat = "EEEE dd MMMM YYYY"

若要只显示小时，请更改格式化程序。dateFormat来

formatter.dateFormat = "HH:mm"

不要忘记在viewDidLoad上添加getCurrentDateTime()。

扩展noiiv的史诗般的简洁解决方案，这里是更简洁的Swift 3/4实现:

斯威夫特3/4

let components = Calendar.current.dateComponents([.hour, .minute], from: Date())
let (hour, minute) = (components.hour, components.minute)

同时，扩展Leo Dabus的扩展，我们可以有:

extension Date {

    func components(_ components: Set<Calendar.Component>) -> DateComponents {
        return Calendar.current.dateComponents(components, from: self)
    }

    func component(_ component: Calendar.Component) -> Int {
        return Calendar.current.component(component, from: self)
    }

    var era: Int { return component(.era) }
    var year: Int { return component(.year) }
    var month: Int { return component(.month) }
    var day: Int { return component(.day) }
    var hour: Int { return component(.hour) }
    var minute: Int { return component(.minute) }
    var second: Int { return component(.second) }
    var weekday: Int { return component(.weekday) }
    var weekdayOrdinal: Int { return component(.weekdayOrdinal) }
    var quarter: Int { return component(.quarter) }
    var weekOfMonth: Int { return component(.weekOfMonth) }
    var weekOfYear: Int { return component(.weekOfYear) }
    var yearForWeekOfYear: Int { return component(.yearForWeekOfYear) }
    var nanosecond: Int { return component(.nanosecond) }
    var calendar: Calendar? { return components([.calendar]).calendar }
    var timeZone: TimeZone? { return components([.timeZone]).timeZone }

}

像这样使用它:

let date = Date()
let (hour, minute) = (date.hour, date.minute)