On 5/22/19 11:20 AM, Casey McDermott wrote:
  Instruments shows the child view controller being deallocated improperly 
after a tab switch.
Unfortunately it's either run the debugger or run Instruments, but not both.
So it doesn't help narrow down to when the release happens, exactly.

Instruments has an Allocations list that shows caller and stack trace for 
allocation of each object, but nothing
for release or deallocation.

If Apple views this list- adding release/dealloc info in 
Instruments-Allocations would by extremely useful.


In the Statistic / Allocation Summary list, find the class you want, select that row, and then click the little right arrow to the right of the name. That will open a new list of specific instances of that class. Then pick one of these rows, and again click the little right arrow icon. You'll then see a log of retain/release/autorelease for that instance.
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