Force child classes to implement protocol swift -

how can forced child class implement protocol declared in parent class?

i tried this:

protocol myprotocol {     var myvar : string { } }  class parentclass: myprotocol {     var myvar = "parent" }  class childclass: parentclass { } 

but child class doesn't force me override myvar.

this possible ?

thank much,

morgan

as far knowledge not possible in swift. if try conforming parent class's protocol, leads error "cannot override stored property". since protocol conformed in parentclass.

protocol myprotocol {     var myvar : string {  } }  class parentclass: myprotocol {     var myvar = "parent"  }  class childclass: parentclass {     var myvar = "hello"     // throws compilation error, "cannot override stored property" since it's conformed parentclass itself. } 

added:

in general words multi-level implementation of interface not possible, in ios words protocol's should implemented @ single level only. since you've inherited parentclass, childclass has scope access parentclass members.

class childclass: parentclass, myprotocol {     func printvalue(){         println("newvalue : \(myvar)")         myvar = "hello"     }  } 

hope helps...!