我正在尝试将enter键发送到后台应用程序,如下所示:
CGEventRef a = CGEventCreateKeyboardEvent(eventSource, 36, true);
CGEventRef b = CGEventCreateKeyboardEvent(eventSource, 36, false);
CGEventPostToPSN(&psn, a);
CGEventPostToPSN(&psn, b);它不工作,我想这是因为应用程序必须是最前面的应用程序才能接收按键?我说的对吗?如果是这样的话,有没有什么我可以发送这个事件,而不是首先激活应用程序?如果不是,那么我做错了什么?谢谢。
发布于 2011-05-22 04:39:59
后台的应用程序不会对关键事件起作用。你有两个选择让你的应用程序在后台处理它们:Event Taps和+[NSEvent addLocalMonitorForEventsMatchingMask:]。NSEvent选项非常简单:
// A block callback to handle the events
NSEvent * (^monitorHandler)(NSEvent *);
monitorHandler = ^NSEvent * (NSEvent * theEvent){
NSLog(@"Got a keyDown: %d", [theEvent keyCode]);
// The block can return the same event, a different
// event, or nil, depending on how you want it to be
// handled later. In this case, being in the background,
// there won't be any handling regardless.
return theEvent;
};
// Creates an object that we don't own but must keep track of to
// remove later (see docs). Here, it is placed in an ivar.
monitor = [NSEvent addLocalMonitorForEventsMatchingMask:NSKeyDownMask
handler:monitorHandler];但是您已经在处理事件分流了,所以您可能只想走这条路。
// Creates an object that must be CFRelease'd when we're done
CFMachPortRef tap = CGEventTapCreateForPSN(myOwnPSN,
kCGTailAppendEventTap,
kCGEventTapOptionDefault,
kCGEventKeyDown,
myEventTapCallback,
NULL);回调很简单。有关信息,请参阅事件服务参考中的Callbacks。
https://stackoverflow.com/questions/6079308
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