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码头显示或隐藏时如何获取事件?码头显示或隐藏时发生的事件
码头显示或隐藏时如何获取事件?码头显示或隐藏时发生的事件
如果停靠栏可见或未使用Carbon,则可以收到通知。我不知道有什么办法可可。
(我没有测试过这一点;从代码here的)
创建回调方法:
#import <Carbon/Carbon.h>
static const EventTypeSpec appEvents[] = {
{ kEventClassApplication, kEventAppSystemUIModeChanged }
};
OSStatus DockChangedHandler(EventHandlerCallRef inCallRef, EventRef event, void *userData) {
OSStatus status = eventNotHandledErr;
switch(GetEventClass(event)) {
case kEventClassApplication: {
SystemUIMode *outMode;
SystemUIOptions *outOptions;
GetSystemUIMode(outMode, outOptions);
status = noErr;
}
break;
default:
return;
}
/*Insert whatever you want to do when you're notified of a dock change*/
return status;
}
然后把这个地方要开始监听通知:
InstallApplicationEventHandler(NewEventHandlerUPP(DockChangedHandler), GetEventTypeCount(appEvents), appEvents, 0, NULL);
进一步的信息:http://developer.apple.com/library/mac/#technotes/tn2002/tn2062.html