objective-c – 是否是Block_copy递归？

概述我有一些代码基本上归结为： -(void)doSomethingWithBlock:(BlockTypedef)block{ [Foo doSomethingElseWithBlock:^() { block(); }];} Foo doSomethingElseWithBlock：在它接收到的块上调用Block_copy和Block_release.这在外部范 我有一些代码基本上归结为：

-(voID)doSomethingWithBlock:(BlockTypedef)block{    [Foo doSomethingElseWithBlock:^() {        block();    }];}

Foo doSomethingElseWithBlock：在它接收到的块上调用Block_copy和Block_release.这在外部范围还是必需的,还是内部的Block_copy会处理这个？

解决方法 我引用了苹果开发者文档网站上的 Blocks Programming Topics指南：

When you copy a block,any references to other blocks from within that block are copIEd if necessary—an entire tree may be copIEd (from the top). If you have block variables and you reference a block from within the block,that block will be copIEd.

When you copy a stack-based block,you get a new block. If you copy a heap-based block,however,you simply increment the retain count of that block and get it back as the returned value of the copy function or method.

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