Weak references

I believe weak references are not required when using self inside the dispatch queues. I do not understand what you mean. There may be many cases you should use weak even when using self inside the dispatch queues.

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OOPer

How to determine whether weak self is required or not.

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iphonegamedeveloper

Whether it may make a reference cycle or not. If you cannot judge it by yourself, better use weak self always.

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OOPer