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?
The superclass' implementation of dealloc is automatically called (as far as I know, the compiler inserts the statement [super dealloc] for you).
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