CODEWITHSUNDEEP
iospass-by-referenceweakhidden-variables
Dirk Zhou
Dirk Zhou

Reputation: 51

ios __weak and __autoreleasing

I got some questions after reading the answer to this thread Handling Pointer-to-Pointer Ownership Issues in ARC;

For demo 1, when a reference to a 'strong' attributed variable is passed, a hidden(__autoreleasing) variable is implicitly created and the object doesn't get retained. However for demo 4, when a reference to a 'weak' attributed variable is passed, the object does get retained once.

So my question is quite simple as just my curiosity, why only the hidden variable created from '__weak' gets the object retain+1? Is this pattern designed for any special concerns?

Hoping I explain my question clearly, any help will be appreciated.

Upvotes: 2

Views: 294

Answers (1)

newacct
newacct

Reputation: 122499

a hidden(__autoreleasing) variable is implicitly created and the object doesn't get retained

This is not true. __autoreleasing is something that is retained and autoreleased.

Upvotes: 0

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