Calling methods inside dealloc is problematic, because subclasses already deallocated and calling a method on deallocated objects (especially in Objective-C++ world) may not end up very well. Style Guide forbids using accessors inside init and dealloc, but instance methods are no different:
https://google.github.io/styleguide/objcguide.xml#Avoid_Accessors_During_init_and_dealloc