Upc ‘,关联元组值为’(8,85909,51226,3)’。..., let manufacturer, let product, let check):
print("UPC: \(numberSystem), \(manufacturer), \(product...(numberSystem, manufacturer, product, check):
print("UPC : \(numberSystem), \(manufacturer), \(product...// earthsOrder is 3
let sunsetDirection = CompassPoint.west.rawValue
// sunsetDirection is "west"
从原始值初始化...此示例从原始值7中识别天王星:
let possiblePlanet = Planet(rawValue: 7)
// possiblePlanet is of type Planet?