cocoa - NSOperation main 中的 NSAutoreleasePool？

Question

+[NSThread detachNewThreadSelector:toTarget:withObject:] 的文档说:

For non garbage-collected applications, the method aSelector is responsible for setting up an autorelease pool for the newly detached thread and freeing that pool before it exits.

我的问题是，我是否需要在重写 -[NSOperation main] 方法中创建自己的 NSAutoreleasePool ，还是创建 NSAutoreleasePool 由 NSOperation 处理？

Answer 1

问得好，即使苹果自己的文档和示例代码对此也不是很清楚。我相信我已经找到了答案:

Because operations are Objective-C objects, you should always create an autorelease pool early in the implementation of your task code. An autorelease pool provides protection against the leaking of Objective-C objects that are autoreleased during your task’s execution. Although there might already be a pool in place by the time your custom code is executed, you should never rely on that behavior and should always provide your own.

基本上，即使可能有一个像 David 提到的那样的池，您仍然应该创建自己的池。