swift - Why can not set name of SKSprite in its init function? -

i have extended skspritenode , want set name attribute in init function:

class ship: skspritenode {       var id: int      /**      *  image name of sprite image bubble.      **/     var image: string      //some other vars not name, because super class sknode has name      init(ship: (name: string, <other vars>), position: cgpoint) {          let texture = sktexture(imagenamed: self.image)         super.init(texture: texture, color: uicolor.clearcolor(), size: texture.size())         self.name = name //here set name!!!         self.position = position          self.physicsbody = skphysicsbody(circleofradius: self.size.width / 2)         self.physicsbody!.dynamic = true     }      required init(coder adecoder: nscoder) {         fatalerror("init(coder:) has not been implemented")     } } 

but later, when create 'ship' (ship[1] values including name):

var titanic = ship(ship: ship[1], position: shipposition!) println(titanic.name) //nil self.addchild(titanic) titanic.name = 'titanic' println(titanic.name) //titanic 

as can see - name not set on initialization - have set after created.

how can set name in init method? or have name after creation?

in context, self.name = name means same thing self.name = self.name.

you trying pass variable in tuple, want self.name = ship.name. (or name = ship.name.)

or, pass these arguments directly initializer:

init(named name: string, <other vars>, position: cgpoint) {     // ...     self.name = name }  ship(named: "titanic", <other vars>, position: shipposition!)