class var hours: UnitDuration
class var minutes: UnitDuration
class var seconds: UnitDuration
class var milliseconds: UnitDuration
class var microseconds: UnitDuration
class var nanoseconds: UnitDuration
class var picoseconds: UnitDuration
Availability 有効性
Technology
class UnitDuration : Dimension
You typically use instances of NSUnit
to represent specific quantities of planar angle using the NSMeasurement
class.
あなたは概してNSUnit
のインスタンスを使用して、NSMeasurement
クラスを使っている平面角(planar angle でなく duration 期間?)の具体的な量を表します。
Duration is a quantity of time. The SI unit for time is the second (sec), which is defined in terms of the radioactivity of a cesium-133 atom. Duration is also commonly expressed in terms of minutes (min) and hours (hr). 期間は、ある時間の量です。時間に対するSI単位は、秒(sec)です、それはセシウム133原子の放射能に基づいて定義されます。期間はまた、一般に分(min)と時(hr)に換算して表されます。
Note 注意
Use the NSDate
class to represent quantities of calendrical units, such as days, weeks, months, and years.
NSDate
クラスを使って、暦に関する単位の量、たとえば日数、週数、月数、そして年数を表してください。
The NSUnit
class defines its base unit as seconds
, and provides the following units, which Unit
converters initialize with the given coefficients:
class var hours: UnitDuration
class var minutes: UnitDuration
class var seconds: UnitDuration
class var milliseconds: UnitDuration
class var microseconds: UnitDuration
class var nanoseconds: UnitDuration
class var picoseconds: UnitDuration
class UnitAcceleration
class UnitFrequency
class UnitSpeed