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iOS Dev: Enable or Disable ARC

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Enable ARC on OLD files : 
I want to bring a single Objective-C class written using ARC into an old project. 
Add -fobjc-arc flag to any files for which you'd like to enable ARC, as described in the ARC documentation

If you want to enable ARC for many files, you have to:
  1. Open "Build phases" --> "Compile sources"
  2. Select files with "left_mouse" + "cmd" (for separated files) or "shift" (for grouped files - select first and last)
  3. Press "enter"
  4. Paste -fobjc-arc
  5. Press "Enter/Done".

Disable ARC on MULTIPLE files:

Add -fno-objc-arc flag to any files for which you'd like to disable ARC, as described in the ARC documentation

If you want to disable ARC for many files, you have to:
  1. Open "Build phases" --> "Compile sources"
  2. Select files with "left_mouse" + "cmd" (for separated files) or "shift" (for grouped files - select first and last)
  3. Press "enter"
  4. Paste -fno-objc-arc
  5. Press "Enter/Done".
Keep Coding :)

Thanks .....
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