要去除QScrollArea的上下箭头，可以使用样式表来自定义滚动条的外观。请尝试将以下代码添加到您的代码中：
QScrollBar* verticalScrollBar = scrollArea->verticalScrollBar();
// 隐藏上下箭头
verticalScrollBar->setStyleSheet("QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical { height: 0; }");
// 刷新样式
scrollArea->update();
这将隐藏垂直滚动条的上下箭头。如果需要隐藏水平滚动条的左右箭头，可以类似地设置水平滚动条的样式表：
QScrollBar* horizontalScrollBar = scrollArea->horizontalScrollBar();
// 隐藏左右箭头
horizontalScrollBar->setStyleSheet("QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal { width: 0; }");
// 刷新样式
scrollArea->update();
确保在调用scrollLayout->addWidget(childWidget, 0, Qt::AlignTop);之前应用以上代码，以确保正确隐藏箭头。
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![func orangesRotting(grid [][]int) int {
var totalOrigin, curOrigin, totalTime int
queue := make([][2]int, 0)
height := len(grid)
width := len(grid[0])
for i := 0; i < height; i++ {
for j := 0; j < width; j++ {
if grid[i][j] == 1 {
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![root@ght:~# journalctl -u lsyncd.service -n 10
-- Logs begin at Mon 2023-08-14 02:38:05 UTC, end at Thu 2024-10-31 01:05:02 UTC. --
Oct 31 00:47:51 ght systemd[1]: lsyncd.service: Succeeded.
Oct 31 00:50:50 ght systemd[1]: Started Lsync Service.
O...](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162232428008348.png)
![func orangesRotting(grid [][]int) int {
var totalOrigin, curOrigin, totalTime int
queue := make([][2]int, 0)
height := len(grid)
width := len(grid[0])
for i := 0; i < height; i++ {
for j := 0; j < width; j++ {
...](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162215084030351.png)
