NSEC_PER_MSEC iOS 4.0+ iPadOS 4.0+ macOS 10.7+ Mac Catalyst 13.0+ tvOS 9.0+ watchOS 2.0+ visionOS 1.0+ var NSEC_PER_MSEC: UInt64 { get } See Also Time Multiplier Constants var USEC_PER_SEC: UInt64 var NSEC_PER_SEC: UInt64 var NSEC_PER_USEC: UInt64 Current page is NSEC_PER_MS...
PER 每 NSEC 纳秒 MSEC 毫秒 USEC 微秒 #defineNSEC_PER_SEC 1000000000ull 多少纳秒 = 1秒 1秒 = 10亿纳秒#defineNSEC_PER_MSEC 1000000ull 多少纳秒 = 1毫秒 1毫秒 = 100万纳秒#defineUSEC_PER_SEC 1000000ull 多少微秒 = 1秒 1秒 = 100万微秒#defineNSEC_PER_USEC 1000ull 多少纳秒 = 1微秒 1微秒 =...
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