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。
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