Objective c CGEventPostToPSN-如何发送具有不同键盘区域设置的键？

我将按键发送到另一个应用程序，如下所示：

- (void)keyPress:(int)hotkey withModifier:(unsigned int)modifier withKeyDown:(BOOL)keyDown{


// verify the process still exists
ProcessSerialNumber psn = [self myPSN];
CGEventRef keyEvent = NULL;

// create our source
CGEventSourceRef source = NULL; // this didn't used to be NULL, does this matter?
if ( source || 1 == 1 ){

    keyEvent = CGEventCreateKeyboardEvent(source, (CGKeyCode)hotkey, keyDown);

    // set flags for the event (does this even matter? No.)
    CGEventSetFlags( keyEvent, modifier );

    // hit any specified modifier keys
    if ( modifier & NSAlternateKeyMask ){
        PostKeyboardEvent( source, kVK_Option, keyDown );
    }
    if ( modifier & NSShiftKeyMask ){
        PostKeyboardEvent( source, kVK_Shift, keyDown );
    }
    if ( modifier & NSControlKeyMask ){
        PostKeyboardEvent( source, kVK_Control, keyDown );
    }
    if ( modifier & NSCommandKeyMask ){
        PostKeyboardEvent( source, kVK_Command, keyDown );
    }

    // post the actual event
    CGEventPostToPSN(&psn, keyEvent);
    usleep(30000);

    // post it again if we're doing key up, just in case!
    if ( !keyDown ){
        CGEventPostToPSN(&psn, keyEvent);
    }

    // release
    if ( keyEvent ){
        CFRelease(keyEvent);
    }
}
}

基本上，如果使用美国键盘，我可以发送键，比如发送：kVK_ANSI_a

问题是对于非美国键盘，如果键盘布局未设置为美国，如何调整这些键以仍能正确发送

以下是我遇到问题的虚拟密钥代码：

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提前谢谢

我认为这是与

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