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objective-csubclasssuperclass

warning: incompatible Objective-C types assigning superClass to subClass

Assume a valid super class, and a valid subclass ie the classes work.

the following line in a constructor of the subclass self = [super init] ;

throws the following warning // warning: incompatible Objective-C types assigning 'struct Animal *', expected 'struct Cat *'

Any ideas on how to fix this and remove the warning ?

Cheers

Solution

  • Do you provide a custom init-Method in your superclass?

    Check the return type of this method. Is it (Animal *)? If so, change this to (id).

    Init methods should return (id)