The class UnitDuration lets you use seconds, minutes and hours, but not milliseconds.
On the apple site I found this in relation to it:
@NSCopying class var milliseconds: UnitDuration { get }How can I implement this into my code? (I am new to swift)
Thanks in advance
According to the doc, you can define your own subclass of Dimension or Unit .
Or you might write your own implementation of `UnitDuration.milliseconds`.
But I do not have enough experience about it.
First try:
extension UnitDuration {
static let msec: UnitDuration = {
UnitDuration(symbol: "msec", converter: UnitConverterLinear(coefficient: 0.001))
}()
}
let timePeriod = 123.45678
let timeMesure = Measurement(value: timePeriod * 1000, unit: UnitDuration.msec)
print(timeMesure) //-> 123456.78 msecWhat do you want to do exactly ?
If you have a duration and want to display as hh mn ss ms:
let duration = 125.42 // in seconds
let ti = NSInteger(duration)
let ms = Int((duration.truncatingRemainder(dividingBy: 1)) * 1000)
let seconds = ti % 60
let minutes = (ti / 60) % 60
let hours = (ti / 3600)
let tt = String(format: "%0.2d:%0.2d:%0.2d.%0.3d",hours,minutes,seconds,ms)
print(tt).milliseconds can be used for unit conversion (transforming minutes in ms for instance)
See here for unit conversion
h ttps://www.hackingwithswift.com/example-code/system/how-to-convert-units-using-unit-and-measurement
I am trying to return a measurement value with the units "ms", similar to here which returns in hertz (Hz):
else if length > 0 && length > (speed / 1000) {
let resultFreq = Measurement(value: (Double(100*(speed / length))).rounded()/100, unit: UnitFrequency.hertz)
for some reason UnitDuration. only lets me use seconds, minutes, hours. I'm wondering how to do a class extension to include milliseconds.
I did this at the end of previous code
let result = Measurement(value: 1000*duration, unit: UnitDuration.milliseconds)
print(result)gives
125420.0 ms
Yes that is what I tried originally, but it gives me this error:
Type 'UnitDuration' has no member 'milliseconds'
And it's the same error if I try and do the conversion from seconds.
UnitDuration.milliseconds is available only on iOS 13+.
class var milliseconds: UnitDuration
If your project is targeting earlier iOSs, you cannot use it.
Ah I see, that'd be why then.
Is there any way I can extend the class to include it?
According to the doc, you can define your own subclass of Dimension or Unit .
Or you might write your own implementation of `UnitDuration.milliseconds`.
But I do not have enough experience about it.
First try:
extension UnitDuration {
static let msec: UnitDuration = {
UnitDuration(symbol: "msec", converter: UnitConverterLinear(coefficient: 0.001))
}()
}
let timePeriod = 123.45678
let timeMesure = Measurement(value: timePeriod * 1000, unit: UnitDuration.msec)
print(timeMesure) //-> 123456.78 msecThanks, i'll give this a try
The simplest maybe to test for IOS availability.
If iOS 13, use it
if not, just display it "manually"