问题
In ARC I'm aware that you do not call [super dealloc] in any overrides of -dealloc, so typically I remove observers and timers in there without doing so. However, if I were to subclass a view that I made that releases observation info in -dealloc without calling [super dealloc] in the subclass' implementation of the method, would the super implementation be called automatically to release the observation info handled by the superclass, or would it leak?
回答1:
The superclass' implementation of dealloc is automatically called (as far as I know, the compiler inserts the statement [super dealloc] for you).
External link to LLVM docs
Update
Here is the reference:
Custom dealloc methods in ARC do not require a call to [super dealloc] (it actually results in a compiler error). The chaining to super is automated and enforced by the compiler. Transitioning to ARC Release Notes
来源：https://stackoverflow.com/questions/25377522/super-dealloc-on-arc-subclasses