Swift 07 命令模式 Command Pattern

/*大宏药业的制药机器有2个按钮，按钮A、按钮B。机械操作员不需要知道具体的机械操作原理、只需要透过机器界面操作按钮。机器有2个功能：包装药品、出货药品把操作发送者和执行接受者的控件解耦、当新增功能、更改操作界面更容易。*/protocol Operation {func operate()}class Wrap : Operation {func operate() {print("Wrap product.")}}class Ship : Operation {func operate() {print("Ship product.")}}class Equipment {var p_stEquipmentName : String = ""var p_stMedicine : String = ""var p_mMedicNumber : Int = 0init(p_stInputEquipmentName : String) {p_stEquipmentName = p_stInputEquipmentName}func setEquipment(p_stInputEquipmentName : String) {p_stEquipmentName = p_stInputEquipmentName}func getEquipment() -> String {return p_stEquipmentName}func OperationMachine(p_obOperateCommand : Operation) {p_obOperateCommand.operate()}}var p_obWrapProduct = Wrap()var p_obShipProduct = Ship()var p_obEquipment = Equipment(p_stInputEquipmentName: "MedicineMachine")p_obEquipment.OperationMachine(p_obOperateCommand: p_obWrapProduct)p_obEquipment.OperationMachine(p_obOperateCommand: p_obShipProduct)/*Wrap product.Ship product.*/