将 NSEvent 发送到后台应用程序
我需要将组合键 ^⌘C 发送到具有捆绑标识符 com.company.app 的后台应用程序。然后组合键应该激活该应用程序中的菜单项。
不幸的是，我不知道该怎么做。一些研究向我指出了使用 CGEventPostToPSN() 的 NSEvent 和 CGEvent API，但我无法使其正常工作，因为我不知道如何设置组合键。 CGEventPost() 似乎无法处理我创建的事件，即使所需的应用程序是活动的。
这是我最终想出的代码，但不起作用：
CGWindowID windowNumber;
NSEvent *event = [NSEvent keyEventWithType:NSKeyUp
location:NSZeroPoint
modifierFlags:(NSControlKeyMask | NSCommandKeyMask)
timestamp:[[NSProcessInfo processInfo] systemUptime]
windowNumber:windowNumber
context:[NSGraphicsContext currentContext]
characters:@"c"
charactersIgnoringModifiers:@"c"
isARepeat:NO
keyCode:8];
CGEventRef eventRef = [event CGEvent];
我现在应该对该事件做什么？为什么没有与 CGEventPost() 等效的 NSEvent ？有没有比发布事件更简单的方法来激活该菜单项？我可以轻松获取 NSRunningApplication 的实例，但没有合适的 API 来完成我的任务。
更新： 我得到它的工作：
- (void) postFakedKeyboardEventForCopyScreenToPasteboardToPSN:(ProcessSerialNumber)psn {
CGEventSourceRef source = CGEventSourceCreate(kCGEventSourceStatePrivate);
CGEventRef keyDownEvent = CGEventCreateKeyboardEvent(source, (CGKeyCode)8, true);
CGEventSetFlags(keyDownEvent, (kCGEventFlagMaskControl | kCGEventFlagMaskCommand));
CGEventRef keyUpEvent = CGEventCreateKeyboardEvent(source, (CGKeyCode)8, false);
CGEventSetFlags(keyUpEvent, (kCGEventFlagMaskControl | kCGEventFlagMaskCommand));
CFRelease(source);
CGEventPostToPSN(&psn, keyDownEvent);
CFRelease(keyDownEvent);
CGEventPostToPSN(&psn, keyUpEvent);
CFRelease(keyUpEvent);
}
...
OSStatus err = noErr;
ProcessSerialNumber psn;
err = GetProcessForPID([simulator processIdentifier], &psn);
if (err == noErr)
[self postFakedKeyboardEventForCopyScreenToPasteboardToPSN:psn];
I need to send the key combo ^⌘C to a background app with the bundle identifier com.company.app. The key combo should then activate a menu item in that application.
Unfortunately, I have no clue how to do that. Some research pointed me to the NSEvent and CGEvent API using CGEventPostToPSN(), but I was unable to get it work correctly, as I don't know how to set up the key combo. CGEventPost() didn't seem to work with the events I created, even if the desired app is the active one.
Here is the code I eventually came up with but that doesn't work:
CGWindowID windowNumber;
NSEvent *event = [NSEvent keyEventWithType:NSKeyUp
location:NSZeroPoint
modifierFlags:(NSControlKeyMask | NSCommandKeyMask)
timestamp:[[NSProcessInfo processInfo] systemUptime]
windowNumber:windowNumber
context:[NSGraphicsContext currentContext]
characters:@"c"
charactersIgnoringModifiers:@"c"
isARepeat:NO
keyCode:8];
CGEventRef eventRef = [event CGEvent];
What am I supposed to do with that event now? Why is there no NSEvent equivalent for CGEventPost()? Is there even an easier way to activate that menu item than posting an event? I can easily get an instance of NSRunningApplication, but there is no suitable API to accomplish my task.
Update:
I got it working:
- (void) postFakedKeyboardEventForCopyScreenToPasteboardToPSN:(ProcessSerialNumber)psn {
CGEventSourceRef source = CGEventSourceCreate(kCGEventSourceStatePrivate);
CGEventRef keyDownEvent = CGEventCreateKeyboardEvent(source, (CGKeyCode)8, true);
CGEventSetFlags(keyDownEvent, (kCGEventFlagMaskControl | kCGEventFlagMaskCommand));
CGEventRef keyUpEvent = CGEventCreateKeyboardEvent(source, (CGKeyCode)8, false);
CGEventSetFlags(keyUpEvent, (kCGEventFlagMaskControl | kCGEventFlagMaskCommand));
CFRelease(source);
CGEventPostToPSN(&psn, keyDownEvent);
CFRelease(keyDownEvent);
CGEventPostToPSN(&psn, keyUpEvent);
CFRelease(keyUpEvent);
}
...
OSStatus err = noErr;
ProcessSerialNumber psn;
err = GetProcessForPID([simulator processIdentifier], &psn);
if (err == noErr)
[self postFakedKeyboardEventForCopyScreenToPasteboardToPSN:psn];
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一些注意事项：
也发送 keyDown 事件，而不仅仅是 keyUp。这样，它将更像是真正的按键。
您需要使用该 CGEvent 调用 CGEventPostToPSN，或者至少调用一些发布事件的调用。
A few notes:
Send a keyDown event, too, not just keyUp. That way, it will be more like a real keypress.
You need to call CGEventPostToPSN with that CGEvent, or at least SOME call that posts the event.