Instance Property インスタンスプロパティ

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。

Declaration 宣言 

@property(readonly) NSTimeInterval timeIntervalSinceReferenceDate;

Discussion 議論

This property’s value is negative if the date object is earlier than the system’s absolute reference date (00:00:00 UTC on 1 January 2001). このプロパティの値は、日付オブジェクトがシステムの絶対基準日（00:00:00 UTC 1 January 2001）より早いならば負です。

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。
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。
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。