Scenario: You are using Automatic Reference Counting (ARC) in iOS 5 for your project, but you are also using some old class files or open-source libraries that are not ARC compliant. Your project won't compile.
Solution: Disable ARC on those files that are not ARC compliant by inserting a compiler flag. (Of course, the onus is then on you to ensure that those files adopt the appropriate memory management practice.)
To disable ARC on a per file basis:
1. Select the project in the Project Navigator
2. Select the relevant Targets (there should just be one if you have just created the project)
3. Click "Build Phases" tab along the top on the right hand side
4. Click the "Compile Sources" tab
5. Locate the implementation (.m) file you want to disable ARC and double click it
6. Type or paste in "-fno-objc-arc" on the dialog box that appears
Solution: Disable ARC on those files that are not ARC compliant by inserting a compiler flag. (Of course, the onus is then on you to ensure that those files adopt the appropriate memory management practice.)
To disable ARC on a per file basis:
1. Select the project in the Project Navigator
2. Select the relevant Targets (there should just be one if you have just created the project)
3. Click "Build Phases" tab along the top on the right hand side
4. Click the "Compile Sources" tab
5. Locate the implementation (.m) file you want to disable ARC and double click it
6. Type or paste in "-fno-objc-arc" on the dialog box that appears
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