更新时间:2022-05-23 06:33:31
您可以使用 nodelay()
函数$ c> getch()转换为非阻塞调用,如果没有按键可用则返回 ERR
。如果按键可用,它将从输入队列中拉出,但如果您喜欢 ungetch()
,您可以将其推回队列。
You can use the nodelay()
function to turn getch()
into a non-blocking call, which returns ERR
if no key-press is available. If a key-press is available, it is pulled from the input queue, but you can push it back onto the queue if you like with ungetch()
.
#include <ncurses.h>
#include <unistd.h> /* only for sleep() */
int kbhit(void)
{
int ch = getch();
if (ch != ERR) {
ungetch(ch);
return 1;
} else {
return 0;
}
}
int main(void)
{
initscr();
cbreak();
noecho();
nodelay(stdscr, TRUE);
scrollok(stdscr, TRUE);
while (1) {
if (kbhit()) {
printw("Key pressed! It was: %d\n", getch());
refresh();
} else {
printw("No key pressed yet...\n");
refresh();
sleep(1);
}
}
}