QT+qtablewidget自定义表头【合并单元格】

1、把下列文件放在工程中【已上传到我的文件中】

2、代码

　　　　 auto *headview = new HHeadViewClass(Qt::Horizontal, ui.tableWidget);
	headview->setSectionResizeMode(QHeaderView::Interactive);
	headview->titleHigh = 50;
	headview->setFixedHeight(50);

	headview->SetRowColItemText(0, 0, QStringLiteral("公里"));
	headview->SetRowColItemText(1, 0, QStringLiteral("长度[m]"));

	headview->SetRowColItemText(2, 0, QStringLiteral("高低"));
	headview->SetRowColItemText(2, 1, QStringLiteral("1"));
	headview->SetRowColItemText(2, 2, QStringLiteral("2"));
	headview->SetRowColItemText(2, 3, "3");
	headview->SetRowColItemText(2, 4, "4");

	headview->SetRowColItemText(3, 0, QStringLiteral("轨向"));
	headview->SetRowColItemText(3, 1, "1");
	headview->SetRowColItemText(3, 2, "2");
	headview->SetRowColItemText(3, 3, "3");
	headview->SetRowColItemText(3, 4, "4");

	headview->SetRowColItemText(4, 0, QStringLiteral("轨距"));
	headview->SetRowColItemText(4, 1, "1");
	headview->SetRowColItemText(4, 2, "2");
	headview->SetRowColItemText(4, 3, "3");
	headview->SetRowColItemText(4, 4, "4");

	headview->SetRowColItemText(5, 0, QStringLiteral("水平"));
	headview->SetRowColItemText(5, 1, "1");
	headview->SetRowColItemText(5, 2, "2");
	headview->SetRowColItemText(5, 3, "3");
	headview->SetRowColItemText(5, 4, "4");

	headview->SetRowColItemText(6, 0, QStringLiteral("三角坑"));
	headview->SetRowColItemText(6, 1, "1");
	headview->SetRowColItemText(6, 2, "2");
	headview->SetRowColItemText(6, 3, "3");
	headview->SetRowColItemText(6, 4, "4");

	headview->SetRowColItemText(7, 0, QStringLiteral("垂向加速度"));
	headview->SetRowColItemText(7, 1, "1");
	headview->SetRowColItemText(7, 2, "2");
	headview->SetRowColItemText(7, 3, "3");
	headview->SetRowColItemText(7, 4, "4");

	headview->SetRowColItemText(8, 0, QStringLiteral("横向加速度"));
	headview->SetRowColItemText(8, 1, "1");
	headview->SetRowColItemText(8, 2, "2");
	headview->SetRowColItemText(8, 3, "3");
	headview->SetRowColItemText(8, 4, "4");

	headview->SetRowColItemText(9, 0, QStringLiteral("曲率变化率"));
	headview->SetRowColItemText(9, 1, "1");
	headview->SetRowColItemText(9, 2, "2");

	headview->SetRowColItemText(10, 0, QStringLiteral("轨距变化率"));
	headview->SetRowColItemText(10, 1, "1");
	headview->SetRowColItemText(10, 2, "2");

	headview->SetRowColItemText(11, 0, QStringLiteral("速度"));

	headview->SetRowColItemText(12, 0, QStringLiteral("扣分"));

	ui.tableWidget->setHorizontalHeader(headview);

3、效果

注意要在ui或者代码里设置列数，否则界面全空 

4、为了配合上述，给出下列QHeaderView函数，这里转：https://blog.csdn.net/psujtfc/article/details/43764559

1 . void QTableView::​setColumnWidth(int column, int width） 设置某一列的列宽

2. 通过QHeaderView * QTableView::​horizontalHeader() const获得QHeaderView

在调用QHeaderView里面的函数进行设置

3. QHeaderView的列宽设置函数

3.1 设置限制值

设置列宽最大值：void setMaximumSectionSize(int size)
设置列宽最小值：void  setMinimumSectionSize(int size)

3.2 设置自动适应

设置某一列的自动适应模式：void QHeaderView::​setSectionResizeMode(int logicalIndex, ResizeMode mode)

设置整个表头的自适应模式：void setSectionResizeMode(ResizeMode mode)

ResizeMode：

QHeaderView::Interactive：0 用户可设置，也可被程序设置成默认大小

QHeaderView::Fixed       ：2 用户不可更改列宽

QHeaderView::Stretch      ：1 根据空间，自动改变列宽，用户与程序不能改变列宽

QHeaderView::ResizeToContents：3 根据内容改变列宽，用户与程序不能改变列宽

注意：ResizeMode被设置为1,3时， void QTableView::​setColumnWidth(int column, int width）的效果不会被执行，即不能定义某一列的列宽