would this cause a retain cycle

Question

xCode 5.1, iOS 7.1, ARC Would this cause a retain cycle on topics? I don't think so, as setting event=nil will deallocate the whole tree, so topics will also get deallocated, but I am not sure.

 event -> subEvent -> Topics
  |                     ^
  |_____________________|

This is a [DAG](http://en.wikipedia.org/wiki/Directed_acyclic_graph), not a cycle. — eonil, Jul 14 '14 at 10:04

score 3 · Accepted Answer · edited Jul 14 '14 at 06:10

3

Referring to your graphic:

Both 'arrows' go from event to topics. It would be a cycle if the lines/arrows would describe a cycle. (If topics would retain the event.)

The graphic doesn't show a cycle thus there cannot be a retain cycle in there - so no.

edited Jul 14 '14 at 06:10

Nathan S.

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answered Jul 14 '14 at 06:08

Daij-Djan

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would this cause a retain cycle

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