On Feb 17, 2020, at 12:54 AM, Graham Cox <graham@...> wrote:

That is the case I’m talking about and no, it works fine even if you don’t “worry” about the lifecycle.

Just alloc + init + autorelease, then beginSheet…. it works, it has always worked since completion blocks were introduced.

It also works for the -runModal case also, you can autorelease prior to that call and that also doesn’t cause a lifecycle issue.

You can certainly “worry” about extending the lifecycle into the completion block if you want, except the unbalanced release will throw a compiler warning. That in itself shows how unnecessary it is to bother with.

TL;DR: Normal rules apply, stop overthinking this! Just because an NSAlert has some unusual asynchronous lifespan doesn’t mean it needs to be treated any differently from any other object you instantiate.