SwiftMeasurement

The best way to deal with Measurements and Units in Swift.

Measurements and Units are newly introduced in iOS 10.

• Measurements and Units - WWDC 2016 - Videos - Apple Developer

Usage

• before

Measurement<UnitLength>(value: 3, unit: .kilometers) + Measurement<UnitLength>(value: 4, unit: .kilometers)

• after

3.kilometers + 4.kilometers

SwiftMeasurement supports all units declared in Foundation framework.

• UnitLength
• UnitFuelEfficiency
• UnitElectricResistance
• UnitIlluminance
• UnitDispersion
• UnitElectricCharge
• UnitVolume
• UnitEnergy
• UnitAngle
• UnitDuration
• UnitTemperature
• UnitFrequency
• UnitPower
• UnitElectricCurrent
• UnitElectricPotentialDifference
• UnitAcceleration
• UnitSpeed
• UnitArea
• UnitMass
• UnitConcentrationMass
• UnitPressure

Requirements

Current version is compatible with:

• Swift 5.0+
• masOS 10.12 or later
• iOS 10.0 or later
• watchOS 3.0 or later
• tvOS 10.0 or later

Installation

SwiftMeasurement supports multiple methods for installing the library in a project.

Installation with CocoaPods

CocoaPods is a dependency manager for Objective-C, which automates and simplifies the process of using 3rd-party libraries like SwiftMeasurement in your projects. You can install it with the following command:

$ gem install cocoapods

Podfile

To integrate SwiftMeasurement into your Xcode project using CocoaPods, specify it in your Podfile:

pod 'SwiftMeasurement'

Then, run the following command:

$ pod install

Installation with Carthage

Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

You can install Carthage with Homebrew using the following command:

$ brew update
$ brew install carthage

To integrate SwiftMeasurement into your Xcode project using Carthage, specify it in your Cartfile:

github "ken0nek/SwiftMeasurement"

Run carthage to build the framework and drag the built SwiftMeasurement.framework into your Xcode project.

Future features

• Describe relations between dimentions. [L, M, T, L/T, L/T^2, etc...]

// Speed * Duration -> Length

func * (lhs: Measurement<UnitSpeed>, rhs: Measurement<UnitDuration>) -> Measurement<UnitLength> {
    let v = lhs.converted(to: .baseUnit()).value * rhs.converted(to: .baseUnit()).value
        return Measurement<UnitLength>(value: v, unit: .baseUnit())

}

let duration = 10.hours // 10.0 hr
let speed = 5.kilometersPerHour // 5.0 km/h

(speed * duration).converted(to: .kilometers) // 50.00004 km