将对象方法作为 SCNetworkReachabilityCallBack 传递
有什么方法可以将对象方法而不是函数传递给需要 SCNetworkReachabilityCallBack 作为其参数的函数吗？
SCNetworkReachabilityCallBack 的定义方式如下：
typedef void (*SCNetworkReachabilityCallBack) (
SCNetworkReachabilityRef target,
SCNetworkReachabilityFlags flags,
void *info
);
Is there any way I could pass an object method instead of a function to a function wanting a SCNetworkReachabilityCallBack as its argument?
Here is how SCNetworkReachabilityCallBack is defined:
typedef void (*SCNetworkReachabilityCallBack) (
SCNetworkReachabilityRef target,
SCNetworkReachabilityFlags flags,
void *info
);
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传递一个发送消息的块，然后让您的 C 回调执行该块！ :D
基本上，C 回调将充当粘合代码。由于 Objective-C 方法的 IMP 永远不会是与回调兼容的类型，因此在进行 Objective-C 消息分派之前，您始终需要至少一层间接。如果您需要携带更多状态而不仅仅是对象，块可能会帮助您，但 C 函数存根不会去任何地方。
Pass a block that sends the message, then have your C callback execute the block! :D
Basically, the C callback is going to act as glue code. Since an Objective-C method's IMP will never be of a type compatible with the callback, you are always going to need at least one level of indirection before you get to an Objective-C message dispatch. If you need to carry more state than just the object, a block may help you, but that C function stub isn't going anywhere.
为了安全起见，您可以编写一些 C 或 C++ 粘合代码并传递该函数，然后该函数将调用您的对象方法。
To be safe, you could write some C or C++ glue code and pass that function which would then call into your object method.