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...
其中:ull 是C语言的数值字面量,是显式表明类型时使用的字符串(表示 ”unsigned long long “) 点进宏定义 USEC_PER_SEC :看到很多宏定义,在网上找了一下,感觉解释的怪怪的。索性自己解释一番 SEC 秒 PER 每 NSEC 纳秒 MSEC 毫秒 USEC 微秒 #defineNSEC_PER_SEC 1000000000ull 多少纳秒 = 1秒 1秒 = 10...
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{ ras_arduino_msgs::Encoders& enc = *it;if(enc.timestamp >= msec) { ++k;doubledist_l = (2.0*M_PI*robot::dim::wheel_radius) * (enc.delta_encoder1 / robot::prop::ticks_per_rev);doubledist_r = (2.0*M_PI*robot::dim::wheel_radius) * (enc.delta_encoder2 / robot::prop::t...
V var NSEC_PER_SEC: UInt64 V var NSEC_PER_MSEC: UInt64 V var NSEC_PER_USEC: UInt64 V var DISPATCH_WALLTIME_NOW: UInt Wall Time Constants Dispatch Objects C DispatchObject E DispatchPredicate func dispatchPrecondition(condition() -> DispatchPredicate) Deprecated Deprecated Symbols Classes C Di...
V var USEC_PER_SEC: UInt64 V var NSEC_PER_SEC: UInt64 V var NSEC_PER_MSEC: UInt64 V var NSEC_PER_USEC: UInt64 V var DISPATCH_WALLTIME_NOW: UInt Wall Time Constants Dispatch Objects C DispatchObject E DispatchPredicate func dispatchPrecondition(condition() -> DispatchPredica...
varNSEC_PER_SEC:UInt64{get} Discussion The number of nanoseconds in one second. See Also Time Multiplier Constants varUSEC_PER_SEC: UInt64 varNSEC_PER_MSEC: UInt64 varNSEC_PER_USEC: UInt64
V var USEC_PER_SEC: UInt64 V var NSEC_PER_SEC: UInt64 V var NSEC_PER_MSEC: UInt64 V var NSEC_PER_USEC: UInt64 V var DISPATCH_WALLTIME_NOW: UInt Wall Time Constants Dispatch Objects C DispatchObject E DispatchPredicate func dispatchPrecondition(condition() -> DispatchPredica...