WhyCan Forum(哇酷开发者社区)

static void screen_plusevent_handler(lv_obj_t * obj, lv_event_t event)
{
	switch (event)
	{
	case LV_EVENT_PRESSED:
	{
		counter++;
		lv_label_set_text_fmt(guider_ui.screen_counter, "%d", counter);
		
	}
		break;
	default:
		break;
	}
}

static void screen_minusevent_handler(lv_obj_t * obj, lv_event_t event)
{
	switch (event)
	{
	case LV_EVENT_PRESSED:
	{
		if(counter) counter--;
		lv_label_set_text_fmt(guider_ui.screen_counter, "%d", counter);
	}
		break;
	default:
		break;
	}
}

void events_init_screen(lv_ui *ui)
{
	lv_obj_set_event_cb(ui->screen_plus, screen_plusevent_handler);
	lv_obj_set_event_cb(ui->screen_minus, screen_minusevent_handler);
}