you can disable ARC for individual files by adding a compiler flag -fno-objc-arc
This flag tells the compiler that the files are not ARC based.
To do the this
- Select the target
- Go to Build Phases tab
- Expand the Compile Sources
- Select the files which are not Arc based
- Press Enter
- In the appeared dialog box enter the text -fno-objc-arc
- Done
For more reference please check this question how-can-i-disable-arc-for-a-single-file-in-a-project