Apple recently added the ability for Xcode to automatically create instance variables for you. This means you no longer need to add an @synthesize for each property you create.
But does it really do that always, or are there scenarios where no _ivar is needed? Are there situations wehre you do need an explicit synthesis? For example what about properties which are just passing through values to a sub-object?
I wanted to know, so I experimented a bit. I even filed a Radar with Apple for clarification which came back with a good explanation.
