枚举:是一种新的 数据类型,不是整型不是字符串。枚举能够穷举
enum Direction{
case NORTH,SOUTH,EAST,WEST
}
func showDirection(direction:Direction) -> String{
switch direction {
case .NORTH:
return "北京"
case .SOUTH:
return "南家"
case .EAST:
return "动静"
case .WEST:
return "西苑"
}
}
showDirection(direction: .SOUTH)