Do we need to use __weak self inside UIAnimationBlocks in ARC?

Question

Do we need to use __weak self inside UIAnimation Blocks as given below? Whether it will create retain cycle issue if we are not specifying self as weak?

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Answer 1

This is not a retain cycle. A retain cycle would be

self -> block -> self

In this case we have

animation framework -> block
block -> self

where the first retain is only temporary - the block gets released when the animation ends. Even if a retain cycle happens, it will be only temporary and it won't prevent object deallocation.