多线程中的 autoreleasepool

Question

[myObj performSelectorInBackground:@selector(doSomething) withObject:nil];

这种方式开启一个子线程执行任务的话，是否需要在 doSomething 里加入

@autoreleasepool {}

Answer 1

three occasions when you might use your own autorelease pool blocks:
第3条:If you spawn a secondary thread.

If your application or thread is long-lived and potentially generates a lot of autoreleased objects, you should use autorelease pool blocks.If your detached thread does not make Cocoa calls, you do not need to use an autorelease pool block.

Advanced Memory Management Programming Guide.pdf