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Objective-C provides two methods of application memory management.
- parvindersingh1987 March 10, 2013a) “Manual retain-release” or MRR : Here you explicitly manage memory by keeping track of objects you own. This is implemented using a model, known as reference counting, that the Foundation class NSObject provides in conjunction with the runtime environment.
b) Automatic Reference Counting, or ARC: Here, the system uses the same reference counting system as MRR, but it inserts the appropriate memory management method calls for you at compile-time. You are strongly encouraged to use ARC for new projects.