获取NSInvocation的消息发件人 [英] Get the sender of the message for an NSInvocation

问题描述

我如何获取包裹在NSInvocation中的消息的发件人？

How do I get the sender of the message wrapped in an `NSInvocation?

我在一个对象中，而我刚刚收到了一个调用 forwardInvocation：。
是否有办法知道谁是第一位向我发送消息的人？

I'm in an object, and I've just received an invocation in my forwardInvocation:. Is there any way to know who sent me the message in the first place?

推荐答案

否。有关发件人的信息不可用（除非您显式添加 sender：self 自变量）。

No. Information about the sender is not available (unless you explicitly add an sender:self argument).

另请参见此线程 http://www.cocoabuilder.com/archive/cocoa/194746-is-the-sender-of-an-obj-method-implied-in-the-destination-method.html ：

它不是显式可用的，也不能始终释放
堆栈来弄清楚。甚至也不能保证
发送者确实是一些Objective-C对象。在各种
语言桥的情况下，
可能很容易成为函数或FFI产生的闭包。

It isn't explicitly available, nor can you consistently unwind the stack to figure it out. Nor is there even a guarantee that the "sender" is really some Objective-C object; it could just as easily be a function or FFI produced closure, in the case of the various language bridges.

b.bum

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