objective c - How to enable/disable ARC in an xcode project?

Question

If a project has already been created with ARC disabled, how do I enable it and vice versa?

Answer 1

Open your project and select Edit -> Refactor -> Convert to Objective-C ARC. This will start checking your code if it is ready for the conversion.

See also Clang documentation: Objective-C Automatic Reference Counting (ARC)

How to disable ARC has been answered here