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。
var NSTimeIntervalSince1970 : Double
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。