If I say self->ivar = [[Foo alloc] init];, does ARC actually retain the new object? Or is this type of assignment used typically to prevent a retain?
What is Automatic Reference Counting's impact on an arrow -> dereference?
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That depends on the attributes of
ivar. Ifivarhas strong ownership qualification (the default for most variables) then the object will be retained.It doesn't matter how the variable is found; whether it is a local, global, implicit instance (just the variable name), explicit instance (e.g.
->as in your sample), etc.; it only matters what the ownership qualifier on the variable is - ARC will do the right thing as indicated by the ownership qualifier.HTH