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Project settings for ARC
When a project is set to utilize ARC, the compiler flag -fobjc-arc is by default set for every Objective-C source file. ARC can be disabled for particular classes through the compiler flag, -fno-obj-arc. In Xcode, go to the target Build Phases tab, open the Compile Sources group, and you will be able to see the source file list. When you double-click on the file where you want to set it, a pop-up panel will appear. In that panel, get in the -fno-obj-arc flag and click on Done to finish.
If ARC was not enabled when the project was created, then to enable it, follow this process:
- Open the project.
- Go to Edit | Refactor | Convert to Objective-C ARC.
- If there is no problem and it's ready to convert, it will check your code.
By default, all newly created Objective-C projects in Xcode 5 are enabled with ARC. However, if you need to disable it, follow these steps:
- Select Project.
- Select Targets.
- From the right panel, go to Build Settings.
- Select Automatic Reference Counting.
- Select Apple LLVM compiler 3.0 – Language.
- Locate Objective-C++ Automatic Reference Counting and, in all three sections, select NO.
