Best way of preventing other programmers from calling -init

Question

When designing a class hierarchy, sometimes the subclass has added a new initWithSomeNewParam method, and it would be desirable to disable calls to the old

Answer 1

initWith:Stuff and:OtherStuff should never be more than convenience constructors.

In that they effectively should call

self = [self init];

if(self)
{
    self.stuff = Stuff;
    self.other = OtherStuff;
}

so [object init] will always return an object in a predefined state, and [object initWithStuff:stuff] will return the object in the predefined state with stuff overridden.

Basically what I'm getting at is, its bad practice to discourage [object init] especially when someone subclasses your subclass in the future….