gistfile1.swift

enum Settings: Int {
	case Suffix
	case SignificantDigits
	case Count
	
	func toString() -> String {
		switch(self) {
		case .Suffix:
			return "Suffix"
		case .SignificantDigits:
			return "SignificantDigits"
		default:
			return String(self.toRaw())
		}
	}
	
	func defaultValue() -> AnyObject {
		switch(self) {
		case .Suffix:
			return "mm"
		case .SignificantDigits:
			return 2
		default:
			return String(self.toRaw())
		}
	}
}

class SettingsManager {
	
	init() {
		self[Settings.Suffix] = Settings.Suffix.defaultValue()
		self[Settings.SignificantDigits] = Settings.Suffix.defaultValue()
	}
	
	subscript(setting: Settings) -> AnyObject {
		get {
			return _storage[setting]!
		}
		set(newValue) {
			_storage[setting] = newValue
		}
	}
	
	func save() {
		let defaults = NSUserDefaults.standardUserDefaults()

		for (key, value: AnyObject) in _storage {
			defaults.setObject(value, forKey: key.toString())
		}
		
		defaults.synchronize()
	}
	
	func load() {
		let defaults = NSUserDefaults.standardUserDefaults()

		for i in 0..Settings.Count.toRaw() {
			if let setting = Settings.fromRaw(i) {
					_storage[setting] = defaults.objectForKey(setting.toString())
			}
		}
	}
	
	var _storage = Dictionary<Settings, AnyObject>()
	
}

var settingsManager = SettingsManager()
settingsManager[Settings.Suffix] = "km"