(这个问题类似于我最近在这里发布的问题,只是现在我正在使用CGEventPost来模拟更多的击键而不是修改当前事件)
每次按下"h"按钮时,下面的代码都能够插入"a"字符,它适用于所有应用程序。
CGEventRef KeyHandler(CGEventTapProxy proxy, CGEventType type, CGEventRef event, void *refcon)
{
UniCharCount actualStringLength;
UniCharCount maxStringLength = 1;
UniChar chars[3];
CGEventKeyboardGetUnicodeString(event, maxStringLength, &actualStringLength, chars);
if (chars[0] == 'h') {
CGEventRef keyEventDown = CGEventCreateKeyboardEvent( NULL, 1, true);
CGEventRef keyEventUp = CGEventCreateKeyboardEvent( NULL, 1, false);
chars[0] = 'a';
CGEventKeyboardSetUnicodeString(keyEventDown, 1, chars);
CGEventKeyboardSetUnicodeString(keyEventUp, 1, chars);
CGEventSetIntegerValueField(keyEventDown, kCGKeyboardEventKeycode, 0); // 0 is key code of 'a' button
CGEventSetIntegerValueField(keyEventUp, kCGKeyboardEventKeycode, 0);
CGEventPost(kCGSessionEventTap, keyEventDown);
CGEventPost(kCGSessionEventTap, keyEventUp);
return NULL;
}
return event;
}
如果我用退格字符替换"a",某些应用程序(例如 Mac 上的 Microsoft Excel ...)不再识别它。你知道为什么吗?
CGEventRef KeyHandler(CGEventTapProxy proxy, CGEventType type, CGEventRef event, void *refcon)
{
UniCharCount actualStringLength;
UniCharCount maxStringLength = 1;
UniChar chars[3];
CGEventKeyboardGetUnicodeString(event, maxStringLength, &actualStringLength, chars);
if (chars[0] == 'h') {
CGEventRef keyEventDown = CGEventCreateKeyboardEvent( NULL, 1, true);
CGEventRef keyEventUp = CGEventCreateKeyboardEvent( NULL, 1, false);
chars[0] = 'b';
CGEventKeyboardSetUnicodeString(keyEventDown, 1, chars);
CGEventKeyboardSetUnicodeString(keyEventUp, 1, chars);
CGEventSetIntegerValueField(keyEventDown, kCGKeyboardEventKeycode, 51);
CGEventSetIntegerValueField(keyEventUp, kCGKeyboardEventKeycode, 51);
CGEventPost(kCGSessionEventTap, keyEventDown);
CGEventPost(kCGSessionEventTap, keyEventUp);
return NULL;
}
return event;
}
通了。如果我删除代码为事件设置 unicode 字符串,一切都会正常:
chars[0] = 'b';
CGEventKeyboardSetUnicodeString(keyEventDown, 1, chars);
CGEventKeyboardSetUnicodeString(keyEventUp, 1, chars);
但是,我不知道为什么Mac OS上的某些特定应用程序会发生这种情况。
"\b" 转义序列产生 ASCII 0x08。在我的测试中,当我按下删除(即退格键)键时生成的事件是 ASCII 0x7f。
一般来说,这似乎是用来弄清楚如何模拟事件的明显技术。使用捕获该事件并转储其详细信息的工具执行该事件。