是否允许调用[self release]来控制对象的生命周期？ [英] Is calling [self release] allowed to control object lifetime?

问题描述

我想在Objective C中创建一个对象，但我没有对它进行引用。

I want to create an object in Objective C but I don't hold a reference to it.

是否可以通过调用[self release]让对象控制自己的生命周期？

Is it allowed to let the object control its own lifetime by calling [self release]?

以防万一你想知道为什么我需要这个：我想创建一个订阅某些通知的对象，但过了一段时间后不再需要该对象并且应该消失。

In case you're wondering why I need this: I want to create an object that subscribes to some notifications, but after a while the object is no longer needed and should go away.

那么，允许以下内容吗？

So, is the following allowed?

- (void) destroyMyself {
   [[NSNotificationCenter defaultCenter] removeObserver:self];

   [self release];
} 

推荐答案

规则很简单。如果您拥有对象，则应该只释放它。即，使用以new或alloc开头的方法或包含副本的方法获取对象。

The rules are simple. You should only release an object if you own it. i.e. the object was obtained with a method starting "new" or "alloc" or a method containing copy.

可可内存管理规则

因此，除非之前完成[自我保留]，否则对象不得进行[自我释放]或[自动释放]。

An object must not therefore do [self release] or [self autorelease] unless it has previously done [self retain].

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