Swift 4 Programming Cookbook: 50 task-oriented recipes to make you productive with Swift 4 by Keith Moon

Author:Keith Moon [Moon, Keith]
Language: eng
Format: azw3, pdf
Tags: COM046000 - COMPUTERS / Operating Systems / General, COM051010 - COMPUTERS / Programming Languages / General, COM051460 - COMPUTERS / Programming / Mobile Devices
Publisher: Packt Publishing
Published: 2017-09-28T04:00:00+00:00

var start: TransportType.CollectionPoint

var end: TransportType.CollectionPoint

let method: TransportType

var distanceInKMs: Double

var durationInHours: Double

init(method: TransportType,

start: TransportType.CollectionPoint,

end: TransportType.CollectionPoint) {

self.start = start

self.end = end

self.method = method

// CoreLocation provides the distance in meters,

// so we divide by 1000 to get kilometers

distanceInKMs = end.location.distance(from: start.location) / 1000

durationInHours = distanceInKMs / method.averageSpeedInKPH

}

}

The last thing we need to do is to ensure that our TrainStation enum conforms to TransportLocation as this is now a requirement; we just need to declare conformance and add a location property:

enum TrainStation: String, TransportLocation {

case BMS = "Bromley South"

case VIC = "London Victoria"

case RAI = "Rainham (Kent)"

case BTN = "Brighton (East Sussex)"

// Full list of UK train stations codes can be found at

// http://www.nationalrail.co.uk/static/documents/content/station_codes.csv

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