IOS, ARC, Property: (readwrite, nonatomic) vs (radwrite, retain, nonatomic)

Question

I am have read up some tutorials on ARC and am still left a bit confused on properties declarations. I wrote most most my code using the following pattern:

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Answer 1

If you prefer continue to use your code, you can exclude ARC only on the specific file .m you want:

Go to Targets > Build Phases > Compile Sources and select your .m file double click on right column of the selection and add -fno-objc-arc so you are exclude ARC only a selected file.

Or if you want to convert all application to new code with ARC, after make a Backup of you project, go to:

Edit > Refactor > Convert to Objective-C ARC and after this do the same but click on Convert to modern Objective-C Sintax

here the screen:

Pay attention not always working before to try duplicate your project!

Hope this help you