除了注册，还需要什么来获取Quartz回调? [英] Is anything required to get a Quartz callback besides registering for it?

问题描述

我正在尝试使用CGDisplayRegisterReconfigurationCallback在Mac OS X上的Quartz中获取显示重新配置事件.这是超简单的代码:

I'm trying to use CGDisplayRegisterReconfigurationCallback to get display reconfiguration events in Quartz on Mac OS X. Here's the super-simple code:

void CB(CGDirectDisplayID display,
        CGDisplayChangeSummaryFlags flags,
        void *userInfo) {
    std::cout << "In callback!" << std::endl;
}

int main (int argc, char * const argv[]) {
    std::cout << CGDisplayRegisterReconfigurationCallback(CB, NULL) << std::endl;
    std::cout << "Registered callback, sleeping..." << std::endl;
    sleep(10000000);
    return 0;
}

但是，当我插入/拔下监视器等时，回调不会被调用.CGDisplayRegisterReconfigurationCallback返回成功.

However, the callback isn't getting called when I plug/unplug monitors, etc. CGDisplayRegisterReconfigurationCallback returns success.

"OS X开发的新手"将在这里夸大我的背景知识.我需要实例化诸如石英事件循环之类的方法来使回调起作用吗?

'new to os x development' would be an overstatement of my background knowledge here. Do I need to instantiate something like a quartz event loop to get callbacks to work?

推荐答案

您需要某种运行循环.标准的Cocoa或Carbon应用程序将此作为正常事件处理的一部分.我猜最简单的方法是使用CFRunLoopRun.

You need some kind of a run loop. A standard Cocoa or Carbon app has this as part of the normal event processing. I guess the most bare-bones way would use CFRunLoopRun.

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