iphone - removeObject 是否释放对象的 NSMutableArray 中的对象？

Question

我想知道当您在数组中使用 removeObject 删除对象时是否正确处理了删除的对象。被移除的对象会被释放吗？

Answer 1

NSMutableArray 会释放它。如果这是最后一次保留，它将被释放。来自文档:

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.

参见 NSMutableArray documentation .他们的例子，其实是指removeObjectAtIndex::

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