Global Variable グローバル変数

NSTimeIntervalSince1970

The number of seconds from 1 January 1970 to the reference date, 1 January 2001. 1 January 1970から基準日、1 January 2001までの秒数。

Declaration 宣言 

var NSTimeIntervalSince1970: Double { get }

Discussion 議論

1 January 1970 is the epoch (or starting point) for Unix time. 1 January 1970は、Unix時間の基準時点（または開始点）です。

See Also 参照

Getting Time Intervals 時間の隔たりを得る

func timeIntervalSince(Date) -> TimeInterval
Returns the interval between the receiver and another given date. レシーバと別の与えられた日付との間の隔たりを返します。
var timeIntervalSinceNow: TimeInterval
The interval between the date object and the current date and time. この日付オブジェクトと現在の日付と時刻の間の隔たり。
var timeIntervalSinceReferenceDate: TimeInterval
The interval between the date object and 00:00:00 UTC on 1 January 2001. この日付オブジェクトと1 January 2001での00:00:00 UTCの間の隔たり。
var timeIntervalSince1970: TimeInterval
The interval between the date object and 00:00:00 UTC on 1 January 1970. この日付オブジェクトと1 January 1970での00:00:00 UTCの間の隔たり。
class var timeIntervalSinceReferenceDate: TimeInterval
The interval between 00:00:00 UTC on 1 January 2001 and the current date and time. 00:00:00 UTC 1 January 2001と現在の日付と時刻との間の隔たり。