uitableview - Why does my superclass call the subclass' method instead of its own in Swift? -

here's example project: http://cl.ly/3n2u2i1s441m

i'm in uitableviewcell superclass, because when subclass being initiated call super.init(). @ bottom of inits both subclass , superclass, call method, call stylecell applies styling it. method protocol both conform to, 1 implicitly conforming because it's subclass , overrides method.

at end of super class' init, style method gets called, calls subclass' stylecell method, not own.

why on earth happening?

is bug swift? i'm attaching code in addition project above show issue:

superclass table cell:

class supertableviewcell: uitableviewcell, style {     var mysuperview: uiview!      override init(style: uitableviewcellstyle, reuseidentifier: string?) {         super.init(style: style, reuseidentifier: reuseidentifier)          mysuperview = uiview()          dostyle()     }      required init?(coder adecoder: nscoder) {         fatalerror("must created in code.")     }      func dostyle() {         print("super class")     } } 

subclass table cell:

class subtableviewcell: supertableviewcell {     var mysubview: uiview!      override init(style: uitableviewcellstyle, reuseidentifier: string?) {         super.init(style: style, reuseidentifier: reuseidentifier)          mysubview = uiview()          dostyle()     }      required init?(coder adecoder: nscoder) {         fatalerror("must created in code.")     }      override func dostyle() {         super.dostyle()          mysubview!.backgroundcolor = uicolor.greencolor()     } } 

style class , protocol:

class stylemanager: nsobject {  }  protocol style {     func dostyle() } 

this causes runtime error crash occurring when subclass cell tries set view in dostyle().

thought lot , think best illustration of going on putting in 1 "class".

by overriding dostyle function replacing it. can still access super. don't have way call super. super class , make point it's own method. makes sense because super , subclasses not 2 objects. 1 object 1 source of code 1 piece in super , in sub.

so when dostyle function gets triggered super init sees replaced/overridden method.

override great @ doing name says does, overriding methods. implied don't use super.method , override method side side.

aside bad practice. use unique names unique functions (which have). in way makes sense use same name / protocol because in each function setting style. these not 2 separate classes both need style. setting basic style , specific style. 2 different things both need done.

class supersubillustation {     // super , sub class 1 illustation      init() {         subinit()     }       func superinit() {         print("super init")          overridedostyle() // calls sub style because it's own method overridden      }      func subinit() { // sub init, overrides superinit        print("sub init")          superinit() // super.init()          overridedostyle() // sub style      }      func dostyle() {         print("super style")     }      func overridedostyle() {         print("sub style")          dostyle() // super.dostyle      } } 

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side note :

when subclassing create increasingly more specific code. example series of uibutton classes.

class roundedcornersbutton : uibutton {      override init(frame: cgrect) {         super.init(frame: frame)         self.layer.cornerradius = 5     }      required init?(coder adecoder: nscoder) {         super.init(coder: adecoder)         self.layer.cornerradius = 5     } }   class greenbutton : roundedcornersbutton {      override init(frame: cgrect) {         super.init(frame: frame)         self.backgroundcolor = uicolor.greencolor()     }      required init?(coder adecoder: nscoder) {         super.init(coder: adecoder)         self.backgroundcolor = uicolor.greencolor()     } }  class redbutton : roundedcornersbutton {      override init(frame: cgrect) {         super.init(frame: frame)         self.backgroundcolor = uicolor.redcolor()     }      required init?(coder adecoder: nscoder) {         super.init(coder: adecoder)         self.backgroundcolor = uicolor.redcolor()     } } 

even though both init , super.init called, there no conflicts because subclass not call both it's own init , it's super's init.