With the next release of iOS development of apps has changed and there is no need to use retain or release, the new ARC (Automatic Reference Counting) memory management takes care of it all. This will reduce crashes and memory leaks and saving time in the development process. At compile time it understands the objects and releases the objects when it knows they are no longer required, this is very similar to other development languages. This does however mean a lot of work to get existing apps to run, but new apps will be quicker and more reliable when developing.
iOS 5 retain and release gone!
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