func timeIntervalSince (Date) -> TimeInterval Returns the interval between this date and another given date.
この日付と別の与えられた日付の間の隔たりを返します。
var timeIntervalSinceNow : TimeInterval The time interval between the date value and the current date and time.
日付値と現在の日付と時刻の間の時間間隔。
var timeIntervalSinceReferenceDate : TimeInterval The interval between the date value and 00:00:00 UTC on 1 January 2001.
日付値と00:00:00 UTC 1 January 2001の間の隔たり。
var timeIntervalSince1970 : TimeInterval The interval between the date value and 00:00:00 UTC on 1 January 1970.
日付値と00:00:00 UTC 1 January 1970の間の隔たり。
static let timeIntervalBetween1970AndReferenceDate : DoubleThe 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。
typealias Date.Stride A type alias to define the stride of a date.
ある日付のストライド（歩幅）を定義する型エイリアス。