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I had downloaded a Xcode 4.2.1 for lion a few days ago.
But strangely, when I try to use the release method in instance variable,
Error message appears as shown below.
What is the reason for the error message?
How do I resolve the error message can I do?
You created a project with Automatic Reference Counting (ARC) turned on. It does the retaining and releasing for you, and you’re not allowed to mess it up by trying to do it yourself. This is a good thing.
Transitioning to ARC Release Notes
Automatic Reference Counting