Are we need to put weak self for the inner closure if outer closure is weak ?
Generated on 9/6/2024
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In Swift, when dealing with closures, it's important to manage reference cycles to prevent memory leaks. If an outer closure is marked as weak, it means that it does not strongly hold onto the object it captures, allowing that object to be deallocated if there are no other strong references to it. However, if the inner closure captures the same object, it can still create a strong reference cycle unless it also uses a weak or unowned capture.
From the session "Analyze heap memory" at WWDC 2024, it is explained that closures capture references strongly by default, which can lead to reference cycles. To break these cycles, you can use weak or unowned captures. If the outer closure is weak, you should also consider using a weak capture in the inner closure to ensure that the object can be deallocated when no longer needed.
For more details, you can refer to the session Analyze heap memory (21:54) where resolving leaks of Swift closure contexts is discussed.
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