谁应该在iOS应用程序中拥有Dependency Injected对象？

This is probably a fundamental question for an experienced iOS developer, but coming from a Java background where we have lots of Dependency Injection (DI) goodies (i.e., Spring) I'm having some trouble figuring out who should own the DI objects. Unfortunately, I find myself creating a bunch of Singletons which is becoming pretty nasty to manage.This is probably a fundamental question for an