Use the switch case class type in Swift

Sometimes it seems that Swift's grammar is really powerful and perverted, not to mention, directly on the code:

First, define a vehicle's parent class.

Class vehicle{

var wheels:int!

var speed:double!

Init (wheels:int,speed:double) {

Self.speed = Speed

Self.wheels = Wheels

}

Func run () {

println ("The \ (Self.wheels) wheels is running as \ (self.speed) Speed")

}

deinit{//a destructor similar to other programming languages, releasing objects when exiting

Self.wheels = Nil

Self.speed = Nil

}

}

Create a Bike Class

Class bike:vehicle{

Init () {

Super.init (Wheels:2, Speed:10)

}

}

Create a trolley class and a way to refuel

Class car:vehicle{

Init () {

Super.init (Wheels:4, speed:100.5)

}

Func Addoil () {

println ("The Car is adding oil")

}

}

How to create a truck class and add goods

Class truck:vehicle{

Init () {

Super.init (Wheels:4, speed:80.5)

}

Func Addcargo () {

println ("The Car is adding cargo")

}

}

var myvehicle:vehicle = Car ()

Judging if it's a car type,

if (Myvehicle is Car) {

println ("This is a car")

}

Switch myvehicle{

Case let bike as bike://At this point, if Myvehicle is the bike object, assign myvehicle to the bike variable. The following code is similar

Bike.run ()

Case let car as car where car.speed = = 100.5://If it is car and speed is 100.5, this grammar is really perverted

Car.addoil ()//Call your own method

Car.run ()

Case let truck as truck:

Truck.addcargo ()//Call your own method

Default

println ("Unknow")

}

Use the switch case class type in Swift