QString HarmonyOS_Sans_SC_Regular = QCoreApplication::applicationDirPath() + "\\Resources\\HarmonyOS_Sans_SC\\HarmonyOS_Sans_SC_Regular-Regular.ttf"; QFont fontHarmonyOS_Sans_SC_Regular(HarmonyOS_Sans_SC_Regular); fontHarmonyOS_Sans_SC

要将 ui->treeWidget 的表头字体设置为 fontHarmonyOS_Sans_SC_Regular，可以使用以下代码：

ui->treeWidget->headerItem()->setFont(0, fontHarmonyOS_Sans_SC_Regular);
ui->treeWidget->headerItem()->setFont(1, fontHarmonyOS_Sans_SC_Regular);
ui->treeWidget->headerItem()->setFont(2, fontHarmonyOS_Sans_SC_Regular);
ui->treeWidget->headerItem()->setFont(3, fontHarmonyOS_Sans_SC_Regular);
ui->treeWidget->headerItem()->setFont(4, fontHarmonyOS_Sans_SC_Regular);
ui->treeWidget->headerItem()->setFont(5, fontHarmonyOS_Sans_SC_Regular);
ui->treeWidget->headerItem()->setFont(6, fontHarmonyOS_Sans_SC_Regular);
ui->treeWidget->headerItem()->setFont(7, fontHarmonyOS_Sans_SC_Regular);

// 或者可以使用循环遍历的方式设置所有列的字体
int columnCount = ui->treeWidget->columnCount();
for (int i = 0; i < columnCount; ++i) {
    ui->treeWidget-headerItem()-setFon(i, fonHarmoyOanSCSansCReglar;
}

上述代码会将 ui->treeWidget 的表头各列的字体分别设置为 fontHarmonyOS_Sans_SC_Regular。

内容由零声教学AI助手提供，问题来源于学员提问