How to enable ARC for a single file

objective-c automatic-ref-counting
Carlton Gibson picture Carlton Gibson · May 9, 2012 · Viewed 19k times · Source

I want to bring a single Objective-C class written using ARC into an old project. The internet provides many references for how to enable ARC for your project and then disable it for single files but I want to do the opposite.

I want to leave the project as it is, i.e. using manual reference counting, and then enable ARC just for the new file. (My searches have failed me here.)

Is this possible? How?

Answer

Caleb picture Caleb · May 9, 2012

Add the -fobjc-arc flag to any files for which you'd like to enable ARC, as described in the ARC documentation.

Related questions

How can I disable ARC for a single file in a project?

I am using ARC successfully in my project. However, I have encountered a few files (e.g., in unit tests and mock objects) where the rules of ARC are a little more fragile right now. I recall hearing that there …

Read More
Objective-C ARC: strong vs retain and weak vs assign

There are two new memory management attributes for properties introduced by ARC, strong and weak. Apart from copy, which is obviously something completely different, are there any differences between strong vs retain and weak vs assign? From my understanding, the …

Read More
performSelector may cause a leak because its selector is unknown

I'm getting the following warning by the ARC compiler: "performSelector may cause a leak because its selector is unknown". Here's what I'm doing: [_controller performSelector:NSSelectorFromString(@"someMethod")]; Why do I get this warning? I understand the compiler can't check if …

Read More