removeObject是否在NSMutableArray对象中释放对象？ [英] Does removeObject release the object in an NSMutableArray of objects?

问题描述

我想知道什么时候使用removeObject在数组中删除对象，如果删除的对象正确处理。

I was wondering when you remove an object using removeObject in an array if that removed object is handled properly. Would the object being removed be released?

推荐答案

NSMutableArray会释放它。如果这是它的最后一个retain，它将被释放。从文档：

The NSMutableArray will release it. If that's the last retain on it, it will be deallocated. From the documentation:

像NSArray一样，NSMutableArray的实例保持对它们内容的强引用。如果您不使用垃圾回收 [ Jed： iPhone不会] ，当您将对象添加到数组时，对象会收到一个保留消息。当一个对象从一个可变数组中删除时，它接收一个释放消息。如果没有对对象的进一步引用，这意味着对象被释放。如果你的程序保持对这样一个对象的引用，引用将变得无效，除非你在从数组中删除之前发送一个保留消息。

Like NSArray, instances of NSMutableArray maintain strong references to their contents. If you do not use garbage collection [Jed: the iPhone does not], when you add an object to an array, the object receives a retain message. When an object is removed from a mutable array, it receives a release message. If there are no further references to the object, this means that the object is deallocated. If your program keeps a reference to such an object, the reference will become invalid unless you send the object a retain message before it’s removed from the array.

请参见 NSMutableArray文档。它们的例子实际上指的是 removeObjectAtIndex：：

See the NSMutableArray documentation. Their example, in fact, refers to removeObjectAtIndex::

id anObject = [[anArray objectAtIndex:0] retain];
[anArray removeObjectAtIndex:0];
[anObject someMessage];

这篇关于removeObject是否在NSMutableArray对象中释放对象？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！