StackOverflow2013

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2013-11-08T02:54:36.753
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I would assume that when you assign new object to a reference that used to hold an object then the original object is released right away (if nothing else points to it - ref count goes to zero) using ARC and asuming default <code>strong</code> reference as in your loop example. <pre><code>MyObject *object = [[MyObject alloc] init]; // obj1, ref count 1 because strong object = [[MyObject alloc] init]; // obj2, ref count of obj1 should be 0 // so obj1 gets released </code></pre> Apple notes in <a href="https://developer.apple.com/library/mac/releasenotes/ObjectiveC/RN-TransitioningToARC/Introduction/Introduction.html" rel="nofollow">Transitioning to ARC Release Notes</a> <blockquote> Try to stop thinking about where the retain/release calls are put and think about your application algorithms instead. Think about “strong and weak” pointers in your objects, about object ownership, and about possible retain cycles. </blockquote> It sounds that the <code>release</code> is called on object when it's assigned new value, from clang <a href="http://clang.llvm.org/docs/AutomaticReferenceCounting.html" rel="nofollow">Clang 3.4 documentation OBJECTIVE-C AUTOMATIC REFERENCE COUNTING (ARC)</a> <blockquote> Assignment occurs when evaluating an assignment operator. The semantics vary based on the qualification: For __strong objects, the new pointee is first retained; second, the lvalue is loaded with primitive semantics; third, the new pointee is stored into the lvalue with primitive semantics; and finally, the old pointee is released. This is not performed atomically; external synchronization must be used to make this safe in the face of concurrent loads and stores. </blockquote>
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1. POAutorelease pools and when release is called under iOS
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1. USstefanB
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