Macro

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 

#define NSTimeIntervalSince1970

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

- timeIntervalSinceDate:
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。
timeIntervalSinceNow
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。
timeIntervalSinceReferenceDate
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。
timeIntervalSince1970
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。
timeIntervalSinceReferenceDate
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。