如何自定义 wxApp 实现协议？

Question

I am currently using both wxWidgets and CEF framework to build a simple application. While trying to work out a clean quit, I figured out that CEF needs the application to implement CefAppProtocol so that certain events can be sent back. Currently my code crashes with an exception [wxNSApplication isHandlingSendEvent]: unrecognized selector sent to instance 0 . I am assuming this has to do with the wxApp default implementation. Query is how do I make sure that my instance/ class of wxApp confirms to CefAppProtocol ?

Answer 1

wxApp itself doesn't inherit from NSApplication , but you should be able to override wxApp::OSXCreateAppController() to create a custom "controller", which is used as a delegate with [NSApplication sharedApplication] and thus should allow you to handle unknown selectors.

However, it's the "instance 0" part of the message that looks worrisome to me -- doesn't this mean that something is nil when it shouldn't be?