获取当前时间作为字符串 swift 3.0

Question

如何将当前时间作为 字符串（而不是日期）

日期时间格式。

yyyy-MM-dd HH:mm:ss

Answer 1

我就是这么想的。

   // Get today date as String

        func getTodayString() -> String{

                let date = Date()
                let calender = Calendar.current
                let components = calender.dateComponents([.year,.month,.day,.hour,.minute,.second], from: date)

                let year = components.year
                let month = components.month
                let day = components.day
                let hour = components.hour
                let minute = components.minute
                let second = components.second

                let today_string = String(year!) + "-" + String(month!) + "-" + String(day!) + " " + String(hour!)  + ":" + String(minute!) + ":" +  String(second!)

                return today_string

            }

        let today : String!

        today = getTodayString()

Answer 2

要将时间作为字符串，你应该使用 DateFormatter，类似这样的东西，如果有错误，请原谅，我写在这里

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

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